Excellent video, Chris & Jim! I thought I recognized Viggo's Devil before, and I found him here:
http://www.cracked.com/article_19556_5-fictional-devils-who-kind-seem-like-good-guys.html
That article has some other good choices for a devil, apart from the ones others posted about before me, like Jack Nicholson in Witches of Eastwick. He's the kind of guy who'd ask you to dance with him in the pale moonlight.
And like the Joker, I have no idea what that means; it just sounds cool.