These lists are always a little silly; there's no real metric for humor. I'd probably add Ruthless People, another Zucker Brothers project. I'm not a Marx Brothers fan, but I'm a little surprised not to see their names in there somewhere.
The most underrated Zucker Brothers movie, “BASEketball”.
It’s silly, but it made me laugh a lot. Don’t know why Parker and Stone hate on it so much.