One of my favorite bands is Moonsorrow. 15, 20, 25 minute songs. Epic, pagan black metal. Lyrics almost exclusively in Finnish.

I put on one of their songs and feel instantly relaxed.

This is what I'm listening to now:
https://open.spotify.com/track/35tbcLF8iniGHOiIy9vPZ6?si=9d1325e9382543f7