I'll throw in my bit, and you guys can help along...
Death Metal:
Cannibal Corpse
Decapitated
Nile
Deicide
Amon Amarth
Arch Enemy
Technical Death Metal:
Necrophagist
Sleep Terror
Grindcore:
Carcass
Napalm Death
Scar Symmetry
Black Metal:
1349
Mayhem
Immortal
Carpathian Forest
Emperor
Speed/Thrash Metal:
Slayer
Exodus
Testament
Morbid Angel
Melodic Death Metal:
Kalmah
Quo Vadis
Mors Principium Est
Wintersun(?)
Norther(?)
Folk Metal:
Finntroll
Vintersorg
Progressive Death Metal/ Metal:
Dream Theater
Opeth
Symphony X
Sonata Arctica
Power Metal:
Blind Gaurdian
Nightwish
Firewind
Angra
Helloween
I know i'm missing a bunch but you guys can help along with that.
Death Metal:
Cannibal Corpse
Decapitated
Nile
Deicide
Amon Amarth
Arch Enemy
Technical Death Metal:
Necrophagist
Sleep Terror
Grindcore:
Carcass
Napalm Death
Scar Symmetry
Black Metal:
1349
Mayhem
Immortal
Carpathian Forest
Emperor
Speed/Thrash Metal:
Slayer
Exodus
Testament
Morbid Angel
Melodic Death Metal:
Kalmah
Quo Vadis
Mors Principium Est
Wintersun(?)
Norther(?)
Folk Metal:
Finntroll
Vintersorg
Progressive Death Metal/ Metal:
Dream Theater
Opeth
Symphony X
Sonata Arctica
Power Metal:
Blind Gaurdian
Nightwish
Firewind
Angra
Helloween
I know i'm missing a bunch but you guys can help along with that.