Cadori's Voice:
(Herr Mannelig by Garmarna)

https://www.youtube.com/watch?v=z2kc570KwUs

Tazzon's Voice:
(Buntes Volk by Faun & Micha Rhein (the male singer is who I'm referencing))

https://www.youtube.com/watch?v=jHLEoIm4l38

Luna's Voice:
(Byker Hill by the Cottars)

https://www.youtube.com/watch?v=LU5qVKwzZO4

Silvanus's Voice:
(Believer by Imagine Dragons)

https://www.youtube.com/watch?v=IhP3J0j9JmY

Here's yet another one of these for all my dragon OC's lol. Cadori is supposed to be this quiet yet graceful creature so I tried to find a good singer for that. Tazzon is a bit rougher and more playful, hence his singer. Luna/Umbra is a powerful, strong character. And Silvanus...
I don't know I gave up after him XD