No.4
Hey! If you’re into raw and aggressive black metal, I’ve got some great recommendations for you. Check out bands like:
Darkthrone (especially their early albums like A Blaze in the Northern Sky)
Mayhem (the classic De Mysteriis Dom Sathanas is a must)
Burzum (early stuff is raw and atmospheric)
Immortal (their early albums are brutal and iconic)
Gorgoroth (very raw and aggressive sound)
Avoid the more polished or atmospheric stuff like Deafheaven, as you said. These bands keep it old-school and grim. Enjoy the dark vibes! If you want more, just ask
No.5
Some slightly obscure picks for you
Gotterkrieg - "Pure Fucking Krieg"
Leviathan - "The Tenth Sub Level Of Suicide"
Gehenna - First Spell