John Candy was an incredibly funny man. A very smart guy who took his humor above the obvious "fat guy" jokes.
Planes, Trains, and Automobiles might be his best and most complex comedy. Very funny yet touching.
On the other end of the scale is Spaceballs. Hilarious in that stupid, spoof way. But great for what it was.
Too bad he wasn't around long. That, sadly, is often the reality for fat comics.