I still go with the more popular choices of Johnny Depp (that guy can play any part amazingly, and I love his humor i.e. Pirates of the Caribbean) and Will Smith (he's a good suave guy, and I love a lot of his movies). However, on top of these two, I must add my favorite young comedy actor… Ryan Reynolds. Seriously, watch Just Friends, Van Wilder, or Waiting, and tell me this guy doesn't do comedy well. And the action aspect is there for him as well, as he combined comedy and action more than perfectly in Blade: Trinity. Also, in Just Friends, he has a line of “I'm gonna miss him”, and you can't hear him say it and not think of Venkman saying that about Peck, it's even said in the same tone.