shit i've been to so many shows, here's some off top of my head who i have seen
Slayer
Black Sabbath
Iron Maiden
Judas Priest
Slipknot
Hatebreed
icp
twiztid
blaze
abk
esham
bedlam
kgp
project deadman
mars
q strange
king gordy
tech n9ne
Cannibal Corpse
Deicide
Death
and the list goes on