And #1, of course, is... Phil Davison (the "aggressive campaigner").
ADDED: I just rewatched the "Dean Scream" (#3) and — after all these years — what I'm seeing is a failure to completely commit to the scream. He held back. That may be the opposite of what you feel you remember, but watch it. He needed to do a big manly shout, like a guy at a football game, and the hand gesture should have been a fully abandoned punch in the air. What is that he does with his hand? It's like he's doing a comic imitation of somebody else — somebody he doesn't respect — doing a punch. And the yell is kind of an old lady yell. That's why it's never called a yell but a scream.