I thought about the Will Ferrel thing more, and I simply cannot accept that anyone who was involved in the "More Cowbell" bit on Saturday Night Live could be listed as one of the worst comedians. When he reprised the role with Queens of the Stone Age playing it was one of the funniest things I've ever seen.

I actually don't like his movies (though I've never seen Elf), and I can see why people may not be amused by Ferrel, but I think generally he is pretty funny.