and to no suprise, my list is much heavier than everyone elses, lol

Metallica
Slayer
Pantera
Testament
Sepultura
Ozzy Osbourne
Black Label Society
Rob Halford
Iron Maiden
Megadeth
Cryptopsy
Cannibal Corpse
Deicide
Dimmu Borgir
Cradle of Filth
Arch Enemy
In Flames
Carcass
Immortal
Napalm Death
Old Man's Child
At the Gates