Every one of these lists is flawed because personal preference varies by perspective, intelligence and experience. A perfect example, I have lots of friends who think Will Farrell's movies are drop dead funny. But I saw Old School, Talledaga Nights and Anchorman and I might have found three or four laughs among them.
Different funny for different people.
But this is a good list with a lot of laughs to be had. Lots of SNL with a healthy dose of Python.
Give it a look:
50 Greatest Comedy Sketches