If you have not seen There is Something About Mary yet, I believe you will be in for a pleasant suprise. The first time I saw it, I think I almost died laughing, especially the scene with the dog. A good "soft comedy" is Get Shorty with John Travolta and Danny Divito. I say "soft comedy" because it will not have you on the floor laughing but the story, and acting I found to be superb and should put a smile on your face.
Well it depends on the comedy that you want. There's adult comedy and family comedy. But I really liked the movie 21 Jump St. It's hilarious. Oh and you can't miss the Hunger Games. :) They're both great.