For me Spaceballs! But it is close between Blazing Saddles and Young Frankenstein. I know he had a few duds and Dracula Dead and Loving It was a bust, but I watched it again and it was not as bad as I remember.
Watched young frankenstein last night - havent watched it for about 3 months. It is a very funny film and right up there with blazing.
Those two just had so many wall-to-wall funny bits.
Many of this others - like producers, 12 chairs, had amusing moments but the later ones like spaceballs and men in tights seemed more aimed at kids and the humour changed, was a bit strained - but none seemed to match blazing and frankenstein for genuine send-up originality.
Ironically the trailer for the fictional sequel was the best part of the film. Hitler on Ice and Jews in Space.
I'm not a fan of Mel Brooks or his films. To sophomoric for my tastes. Though they strangely grow on me over time. At least some gags do. I've never seen one from beginning to end on first viewing. Still haven't seen Blazing Saddles or Young Frankenstein in their entirety. I did see History of the World Pt 1 in the theater, so did see all of that one.
I quite liked history. It had moments. "its gud t be the king" was funny, especially the chess match, and "Your majesty, you look like the piss boy" ..."and you look like a bucket of shit!" and the roman sequence, the best of which was the two roman soldiers smoking spliff. "Do ya care if it falls?" "Nah - f**k it"
as tg says, high anxiety has some funny moments too, the birds, the phone booth, and a few other scenes.