Seth Rogen
Ubiquitous, wrongly deep-voiced Everyschlub.
Pros: Pretend deep voice good for 'Ho-ho-ho!-ing'. Looks a bit like a twentysomething Saint Nick before he really got to work on the facial hair. There's the pitch! Young Father Christmas...
Cons: Would make all the kids laugh so much they'd die.

Chris Farley
Saturday Night Live//Wayne's World star. Improv master and prolific prankster.
Pros: Obese. Red-faced. Just a little bit bawdy and raddled. Would come over like a jovial but slightly edgy old uncle. Sort of 'How's Yer Father Christmas'...
Cons: Dead.