Needless to say, big-ass language warning on this one. I've got to say, having R. Lee Ermey (Full Metal Jacket), Peter Capaldi (In The Loop), Rodney Dangerfield and Groucho Marx in this is almost unfair. You could fill a top 100 just of those four guys alone.
(also, I didn't realize that 'nerf herder' was a Star Wars line. I thought it was just a random name picked by the band that does the Buffy theme song.)