#i'm terrible at recommending music because my knowledge of bands etc is very limited but hopefuly you'll find this usefull

[lullabyofthejotnar]

Do you happen to know any soundtracks or songs like the ost for ragnarok? I'm currently obsessed with it and yearning for more but i'm bad at finding them lol

For OSTs, I'd recommend the soundtrack for Hellblade: Senua's Sacrifice (especially the second game), Assassin's Creed Valhalla, The Northman, and The Last Kingdom. Then while these are not exactly like God of War's soundtrack, you could try the music for How To Train Your Dragon, Berserk (1997), The Witcher 3: Wild Hunt, Dark Souls/Elden Ring, Attack on Titan (or Sawano Hiroyuki's work in general).

For singers/bands: you should definetly listen to Eivør, as she sang multiple songs in GoW. Then Kalandra, Gealdýr, Wardruna and Heilung.

If you're looking specificaly for something like Blood Upon the Snow, you might like: Ashes and Blood and Guns for Hire by Woodkid, Achilles Come Down by Gang of Youths, or other songs by Hozier.