Done this before, but loads of new actors coming through now!

All time (my pics not in order)

Robert Deniro
Al Pacino
Kevin Spacey
Nicolas Cage
Samuel L Jackson
Jack Nicolson
Denzel Washington
Dustin Hoffman
Brad Pitt
Christopher Walken
Harvey Keitel
Tom Cruise

Newer crop

Edward Norton
Christian Bale
Leonardo Di Caprio
Mark Wallberg
Matt Damon
Mark Ruffalo