I had to go with the Bonzai Drop, because as corny as it was, it is the definition of a finisher. He hit it, and the match was finished.
I love the Figure-Four and the Sharpshooter, and still mark out when I see the People's Elbow, and the finisher's of the 80's were classic, but there's examples of people kicking out of all of them.
I have to ask, where's the Crossface? Is it being excluded because of the attachment to Benoit? It was a move that hurt to watch, and if anyone has ever strapped it on their little brother, they know how effective it really can be. Unless my meory fails me, it took a long time for anyone to figure out how to reverse/escape it, and it was HHH, who isn't half-bad himself...