So who makes you laugh like a adolescent girl? I typically learn more towards stand up comedians but comedic actors would be OK too, as many of them seem to do both these days.

Zack Galifianakis. If you have not seen
Zack Galifianakis: Live at the Purple Onion I sincerely suggest you do so. In my opinion it is the highlight of his career.
But my all time favorite
Jim Gaffigan
my list could go on forever so I'll stop here