What are some good comedy film DVD's I can rent?

Just joined an online DVD rental service, and I need some decent DVD's
to add to my rental list. I prefer comedies, especially parodies. I am
looking for films similar to Naked Gun, Airplane, Scary Movie,
American Pie, National Lampoon. That sort of thing. Preferably well
known films with well known actors and the age of the film isn't
important so long as it's good.

Thanks.