Surprised nobody posted Gintama. It's a funny anime once you get a few episodes in, as a bunch of the first few episodes are character introduction and an attempt to make an Action anime instead of the comedy one it has today.
Still airing today I think (There's no Dub)
I was going to say Gintama, I fucking love Gintoki and his crew and they keep making me laugh.
Theres Also Bebob
Spice and Wolf
Kuroshitsuji II if you haven't seen it.
Robotech (I find it funny due to the actors voices and how they all look like versions of shaggy. Some good action scenes too.)
I heard Eyeshield is good, haven't read it personally.
If you liked Rosario there is: Is this a zombie?