So many come to mind..Ouran,FMA/FMA Brotherhood (even though it has some sad scenes it also had some really funny scenes!),Lucky Star,One Piece,Fairy Tail and 黑塔利亚 too!
I also find One Piece funny at times, and I think Mahoraba: Heartful Days is funny, as well as FMA (Brotherhood and Original)
Oh yeah, 天使 Beats has some funny moments on occasion, too - Like when Hinata has to sit in the rocket chair and get bashed into the ceiling ~hilarious!~