I like some of the ones listed, you guys are good. Comedy is my favorite genre so I can't name just one here.
You've got your "serious but very funny", like Big Lebowski, Knocked Up, 40-yr-old virgin, Superbad, Pulp Fiction, Snatch, Office Space. Greatest quotes ever came from some of these movies!
Family-type comedies - Liar Liar, Bruce Almighty, Vacation ("Excuse me, which way to the highway?" "Yo, Fuck your mother!"...... "Thank You!"),
As far as "other" humor - Beerfest, American Pie 1&2, Austin Powers 2, Jackass 1,2&2.5, Dumb And Dumber, Happy Gilmore, Talladega, Shaolin, Kung Fu Hustle... Japanese movie Versus...
Also, I must say that all the View Askew films by Kevin Smith are some of the best written comedies, based not only on the laughs but phenomenal dialogue.
But the crown-king of all....
Supertroopers. End of the line! As funny as it gets!
1. Shaolin Soccer (original Chinese version)
I didn't think there was any other version..