It's Dave Lombardo hands down!! This guy is a living legend... The Godfather of Double Bass Thrash Drumming... One of the most important drummers of the thrash/speed metal genre. He has inspired and influenced so many prominent drummers such as John Dolmayan, Josh Freese, Mike Wengren, Gene Hoglan, and many more. Even Jordison and Roddy would agree on this. Look for the September 2006 issue of Modern Drummer, for Dave Lombardo's cover feature.
I know these three drummers are great drummers... But it's like comparing Weckl and Colaiuta to... Buddy Rich! Lombardo is a myth in the double bass drumming world.