Charlie Daniels, Johnny Cash, Phil Anselmo, Rob Halford (unfortunately, a pervert against nature) and Bruce Dickinson destroy him. :-)
Phil Anselmo was outstanding in his early days, then he kind of destroyed his voice through heroin and drug abuse. Bruce Dickinson though, just wow. Talk about a banshee cry, especially on "Hallowed Be Thy Name" and "Fear of the Dark". And he's still got it to this day if you listen to their most recent album.