I hadn't seen this when I posted the previous item but something called nerve.com has posted what someone there thinks are the 50 Greatest Comedy Sketches of All Time. About ten of them would make my list. In fact, they don't even include the one I'd probably rank as Numero Uno, which would be the take-off on This is Your Life by Sid Caesar and his constituents on Your Show of Shows. They do have the Python "Dead Parrot" sketch as their number one but for some reason, they have an odd version of it posted.
Ignore the question of whether their picks really are the fifty best. Just think of it as fifty links to funny material. Then, after you watch their picks, go watch my choice as the funniest sketch ever done, at least on network teevee.