Finally a comedy makes the list. Caddyshack is a good example of what an ensemble cast can deliver. Rodney Dangerfield, Bill Murray, and Ted Knight all have great performances. It's a pretty stupid premise done pretty well.
It's a golf movie, maybe, sort of, with several stories loosely tied to events at a country club. If you haven't seen this, or even if you have, it's still a funny movie. I watched it a couple of weeks ago. It holds up pretty well.
Here's a couple of clips.
And a solo scene with Bill Murray. This was improvised. They just put him in the scene and told him to act like a child.