Depp would be able to play the role in my mind. Whether or not he would be the best person for that role is a question that I would have, but I think he would be able to play it. It would depend on how over the top he played it. I do think that is he played the crazy part up as not a funny wacky crazy, but as a dark crazy he could do it very well. And while his most famous role is the crazy crazy type character, I think that he has shown he can cover a large range of characters, and that he could pull this off.
__________________
"As I was walking up the stair,
I met a man who wasn't there.
He wasn't there again today,
I wish, I wish he'd go away."
-From Identity
"As I was walking up the stair,
I met a man who wasn't there.
He wasn't there again today,
I wish, I wish he'd go away."
-From Identity