Did you really think this was in doubt? Since Batman's first days in the late 1930s, The Joker has been the crown prince of crime. He's terrorized Commissioner Gordan, killed Robin and paralyzed Batgirl, and he did it all with a smile. Heath Ledger (above) further cemented the character's No. 1 status by delivering an Oscar-winning performance as The Joker in 2008's "The Dark Knight."