I grant you Airplane is a very funny movie. Probably one of the funniest movies ever made. But I am leery of quantifying “funny”. There are just too many variables to control for.
Obviously missing from the list: Rocketman, Horsefeathers, Monty Python and the Holy Grail, Blazing Saddles, and while I don’t personally appreciate as comedy genius, I am willing to hear arguments for Dumb & Dumber.