I think that names like Tim Roth and Sean Penn are actually far more logical choices for The Joker than someone like Crispin Glover. They may not look exactly like the comic book Joker, but I think they could give a far better performance.
I stated this before, but who is Nolan more likely to cast? A largely unknown character actor with a reputation of being difficult to work with, who has nothing to offer other than looking the part? Or a largely respected character actor who will be an impressive addition to his starry high-quality cast line-up?
And I have to say, VenomFang, that your argument seems very misguided. First ,I have to state that calling great actors like Sean Penn, Benicio Del Toro and Tim Roth "losers", and even implying that they are in any way inferior to Crispin Glover, one of Hollywood's red-headed step-childs, is absolutely absurd.
Secondly, I have to say that I don't think you really have any idea about The Joker as a character. At his best, Joker should NOT be funny, in any way. He's not funny. He should be absolutely terrifying. He paralysed, and probably raped Barbara Gordon. He beat Jason Todd to death with a crowbar, and blew him up for good measure. he has killed and maimed thousands. This is not a funny guy. This is a twisted lunatic who wants to kill you. And he'll laugh while he does it.
And I don't get where this whole beautiful/elegant thing came along. No way. He's very theatrical, yes. But he has been horribly disfigured. He should be a disturbing sight, and therefore shouldn't be played by a pretty boy.
So, enough talk about Crispin Glover. I'd rather have someone who can deliver a great performance as The Joker rather than a great likeness. Everyone campaigning for Crispin Glover reminds me of the people who moaned about Kevin Spacey being cast as Lex Luthor, wanting Billy Zane in the role. Let's have a great character actor playing The Clown Prince of Crime. Penn, Roth, or Del Toro.