Can't go through 21 pages of shit to see what's already posted, I'll just post some of my favorite shit.
Blood Red Throne
Deicide
Mayhem
Burzum
Darkthrone
Malevolent Creation
Carcass
Cannibal Corpse
Slayer
Napalm Death
At The Gates
Dimmu Borgir
KING FUCKING DIAMOND
Unanimated
The Berzerker
Septic Flesh
Cannibal Corpse
Meshuggah
Oh, and Dethklok lol.
Those are just some of my favorites, I got like 40 gigs of all metal music on my external hard drive.