Espeon x Umbreon 

8/10 

-Great ship

-Umbreon might not like how smart Espeon is but they like them since they are who they are and always tell the truth on how they feel.

-Complete Honesty except not that much from Umbreon though.

Jolteon x Glaceon

7/10

-Still ship it.

-Glaceon is a classic tsundere but won't murder you but just insult you.

-Takes a couple of years for them to date. 

Sylveon x Umbreon

9/10

-An otp

-Good communication.

-They both have gone through some shit, but they can always go to each other to talk. Kinda how they started dating because they had things in common and could go to each other to talk to about stuff.