Warning ⚠️ if you haven't seen the new Haunted Mansion you might want to skip this story until after you do as it will contain some spoilers.

I want to give a shout out to Dark_slytherin_girl for the new cover for this story. They did an amazing job. 

Alistair Crump. AKA hatbox ghost

Info: Alistair was the son of an overbearing wealthy socialite and his kind wife. He began as a good-natured person. He and his family lived in a Dutch colonial revival gothic manor in Lousiana. When Alistair was nine, his mother died, and he was unable to cope up with the situation, which made his father abuse him ever since. Not wanting a son he deemed as weak, his father expelled him from their home, wherein Alistair was treated as an outcast by other socialites.

No longer wanting to be associated with him or any of them, Alistair left the estate and traveled the world, getting educated and working his way up the ranks until he became a wealthy tycoon.

Years later, Alistair eventually returned to Louisiana when his father suspiciously died and regained all that belonged to him, including the manor. Believing that his fellow socialites were responsible for his father's abusive behavior and the death of his mother, Alistair became a vengeful person and would throw lavish parties that ended with him murdering the guests in horrifying ways, with rumors saying that the murders were blood sacrifices to maintain his wealth and power while others were about vengeance. Eventually, this caught up to him and he was beheaded by an angry mob of his servants, but not before declaring that he will be back to haunt everyone.

Eventually, Alistair's vengeful spirit, now in the form of the Hatbox Ghost, was accidentally invited into William Gracey's mansion during a seance held by William and Madame Leota to contact Gracey's deceased wife Eleanor. Crump impersonated Gracey's wife and eventually convinced him to commit suicide in order to "join her". When Leota attempted to identify Alistair and banish him, he imprisoned her within her own crystal ball. Alistair then took complete control of the mansion, saturating it with his oppressive energy and forcing the other ghosts to obey him. He used the mansion as a means to harvest souls for a ritual which would unbind him from the mansion grounds and enable him to wreak his vengeance upon the realm of the living.

This incarnation is classified as a tragic villain, given his backstory.

Ramsley:

Ramsley was a sophisticated chief servant and father figure of Edward Gracey, the master of the Mansion. However, he uses the relationship to manipulate Edward. When Edward fell in love with a African American woman named Elizabeth Henshaw, Ramsley, being a racist, saw this as a "disgrace" that could ruin the house.

In an attempt to prevent Edward from abandoning his home and lineage, Ramsley murdered Elizabeth by poisoning her drink and sent Edward a note from Elizabeth that he forged, making it appear as suicide via poison. However, Ramsley did not expect that the loss of his master's beloved would devastate Edward into following suit and hanging himself. Upon Edward's death, a curse was cast over the mansion:

Until Elizabeth and Edward's spirits were reunited, none of the inhabitants' ghosts could pass over to the High Heavens.
However, this leaves out a few key elements to the mansion's story and how things play out.

Henry Ravenswood as he appeared in his corruptible, mortal-state. AKA: the Phantom

Born in 1795, Henry Ravenswood was initially a simple prospector in the old West, but his discovery of gold in Big Thunder Mountain in 1849 would make him a fortune. The town of Thunder Mesa sprang up soon after, and Ravenswood would establish financial dominance of the mining operations in the area. Ravenswood would build a stately manor on a hill overlooking the river and the boomtown he'd helped create with other founding fathers.

Local natives warned that the mountain was the resting place of the legendary Thunderbird, and that if the settlers kept mining, the spirits of the mountain would grow angry and cause misfortune. Ravenswood, ignoring the warnings of the legend, continued to work in the mines.

As the years passed, Henry would become increasingly possessive of his daughter, now a young woman. He deeply resented the string of suitors that came looking for Melanie's hand, as none of them were good enough for her in his eyes. As a result, Henry arranged for the deaths of four of her suitors: Barry Claude, an oil-field salesman who was mauled by a bear; Captain Rowan D. Falls, the captain of the Mark Twain Riverboat who was sent over a waterfall in a rowboat; saw-mill owner Sawyer Bottom, who was bifurcated with an industrial buzz-saw; and explosives manufacturer Ignatius "Iggy" Knight, who blew up with a large amount of dynamite.

At some other unknown point of time, Henry cheated during a duel with another gentleman by turning around before the draw and firing at the man's back, killing him. It is also rumored that he had an affair with the manor's chamber-maid Anna Jones.

Melanie's fifth and final suitor was a train engineer working in Thunder Mesa, and it was not long before they were making plans to wed. Ravenswood, for once, consented the union, but when he learned that Melanie's beau intended to take her away from Thunder Mesa, he became furious and vowed he would do everything he could to prevent it.

However, before he could take action to stop the wedding, the great earthquake of 1860 devastated Thunder Mesa, and Ravenswood and his wife were killed. Some claimed it was the wrath of the Thunderbird that caused the tragedy while others said it was the result of a massive dynamite blast from the Mountain. Henry and Martha were then buried side-by-side in Boot-Hill Cemetery.

Some time later, Mélanie and her lover arranged to marry within the Great Hall of Ravenswood Manor. However, the groom never appeared. Mélanie refused to believe that her beloved would ever leave her, and waited for him as the guests filed away. The forlorn bride would never be seen beyond the house's walls again.

Legend has it that Mélanie's groom was murdered by a spectre known as the Phantom, who had lured him into a discreet and secluded part of the Manor and hanged him from the rafters. The Phantom became an infamous figure of the town's folklore and, along with Madame Leota, summoned many spirits to Ravenswood Manor. Many would also go missing within and around the grounds, their fates blamed on the Phantom.

Throughout the mansion's closure, several spirits left Phantom Manor and encountered citizens. When the manor was reopened, Henry attended the ceremony in the human form of an elderly man. At the ceremony, Henry opened the gates of the mansion and introduced himself as an affiliate of the Big Thunder Mining Company. Henry went on to invite several of the guests into Ravenswood Manor as his new prey.

Ghost bride Constance Hatchaway

AKA: Connie
The Black Widow Bride
The Bride
Widow Abigail Patecleaver (deleted script)
Constance Hightower
Constance Harper
Constance Banks
Constance de Doom
Constance Caine

CONSTANCE HATCHAWAY quote:

Here comes the bride... As long as we both shall live... For better or for... worse, (chuckle) I do. I did, In sickness and in... wealth, You may now kiss the bride, We'll live happily ever... after, Till death... do us part...

Constance Hatchaway was a beautiful woman who sought to obtain wealth and luxury. She accomplished this by marrying several rich men, including bankers, businessmen, farmers, and barons. However, each was murdered after the wedding by the deadly bride, decapitated with a hatchet so that she could claim their inheritance. Despite her crimes, she was never punished (likely due to lack of evidence), though the public did dub her "The Black Widow Bride".

Her husbands were:

Ambrose Harper: The naive but good intentioned son of successful farmers (married in 1869)

Frank Banks An eastern banker and community pillar (married in 1872)

The Marquis de Doome A foreign diplomat with a military past (married in 1874)

Reginald Caine A celebrated railroad baron, gambler and world renowned gourmand (married in 1875)

George Hightower A (possible) relative of the wealthy hotel owner/explorer Harrison Hightower III (married in 1877)

It was her final husband who was one of the many owners of the titular mansion. After murdering Hightower, Constance decided that she was satisfied with the wealth she had accumulated and settled down in her newly inherited mansion. She died later of unknown causes, though most speculate that it was old age.

After her death, Constance's spirit became enveloped by her sadistic, homicidal side. She became a permanent resident of the mansion's attic, standing among her hordes of past wedding gifts and admitting to her crimes.

In the unofficial Ghost Gallery Storyline (which was created before the merging of the Attic Bride and the Black Widow Portrait) the woman in the stretching room portrait was said to have been the Ghost Host/Master Gracey's mother, Mary Gilbert Gracey and that she murdered her husband after learning he had an affair.

Meanwhile the identity of the Bride character was referred to as Emily Cavenaugh, the 16 year old second bride of Master Gracey who was murdered Gracey's former lover Madame Leota who locked Emily in the chest she was hiding in during a game of hide-and-seek, resulting in Emily suffocating to death.

Phantom Manor
You may not believe it, but beauty once lived in this house...And beauty lives here still."

Melanie Ravenswood

As the daughter of Henry and Martha Ravenswood, Mélanie was doted on by her wealthy parents at a young age. Nothing was considered too good for her and she had every luxury available bestowed on her. It was speculated that perhaps this is what steered her toward the common folk of Thunder Mesa, the town her father had helped build.

As a young woman, Mélanie attracted a number of would-be suitors, much to the chagrin of her father. Four men courted her over the years - oil-field owner Barry Claude, explosives manufacturer Ignatius Knight, Captain Rowan D. Falls of Thunder Mesa's Mark Twain Riverboat, and sawmill owner Sawyer Bottom - each of whom died in bizarre accidents, leaving Mélanie to wonder if she were cursed.

Mélanie's final paramour was a train engineer working on the Big Thunder Mountain Railroad. The two made plans to be married and Melanie could not be happier. However, when her father learned that Mélanie's fiancé planned to take her away from Thunder Mesa to start a new life, he became outraged, vowing to stop the wedding no matter what. Unfortunately, Thunder Mesa was struck by a major earthquake in 1860 which took place shortly before Mélanie's planned wedding. Both of her parents died in the catastrophe along with hundreds townsfolk.

The day of her wedding came, and the blushing bride eagerly anticipated her groom's arrival. However, he never showed up and rather than give up hope. Mélanie vowed to wait for him by claiming that he would never have abandoned her.

Days turned to weeks, to months, to years, and the bride became a recluse, living alone in the manor and singing forlorn songs of lost love, pining for her fiancé. Some people said Mélanie was mad, but most of them believed that perhaps that she couldn't leave even if she wanted to; that some force, be it her broken-yet-faithful heart or something more malevolent, kept her there indefinitely.

No one seems to be entirely sure what became of Mélanie. Most assume she passed on, as its hard to believe she would still be alive after so many years. Yet locals claim they still can hear her singing on the evening air when it's quiet, along with sinister laughter and the sounds of an unseen party drifting from the old Ravenswood estate.

Etc etc etc