9. Crispin Glover
Youll remember Crispin Glover from his turn as Marty Mcflys unassuming future dad in the iconic Back to the Future trilogy. At 48, You might consider him too old to Joker it up at this point thanks to the youthfulness that Ledger brought to his performance but you cant deny that Glover certainly has echoes of a comic book Joker. With his angular features and his proven track record for creepiness (remember his turn as the hair sniffing weirdo in Charlies Angels 2 a turkey of a movie, but an unsettling bad guy provided by Glover). Hes got a reputation for being a quiet, private man in real life but hes also been known to go bat-shit crazy at the drop of a hat. I refer you to exhibit A: http://youtu.be/ALapHYNSmoA With the above unhinged, rambling performance on Letterman in mind, I can fully imagine him providing a Joker that would stand on its own as potentially the closest to the comic books yet.