Not to be totally unoriginal, but by far, Michael Ball. I absolutely adore him, and I hope he comes to do Hairspray on Broadway. I also preferred his turn as Count Fosco to Michael Crawford's by far (and I like Michael Crawford!)
Also, TIM CURRY. He's amazing in everything he does, even completely horrible films like "Scooby Doo and the Witch's Ghost" and "The Worst Witch". Tim Curry's just so delightfully cheesy, you can't help but love him. Actually, 'delightfully cheesy' is probably the best way to describe Michael Ball as well.
In my pants, she has burst like the music of angels, the light of the sun! --Marius Pantsmercy