In no order
Eddie Van Halen
Steve Vai
Randy Rhoads
Yngwie Malmsteen
Tony Iommi
Slash
Kirk Hammett
Joe Satriani
Ron Thal
Buckethead
Dimebag Darrel
Adrian Smith and Dave Murray
Tom Morello
Adam Jones
John Petrucci
Kerry King
KK Downing
Glen Tipton
several others
Dont nickpick, its not a skill based list and it wasn't meant to be, i didn't put Batio in there for a reason.