11. Edge
I'm a huge Edge fan, so I'll try to spin this as positively as I can: no one in WWE history had as much success with a finisher as awful-looking as Edges Spear. Think about it this way: Goldberg's monstrous, ribcage-imploding Spear won him two world titles, and those in tandem with Jackhammers. Edges version had all the forward momentum of a mime walking against the wind and it won him ELEVEN. Even if it objectively looked like trash, it'd have to be considered one of the deadliest maneuvers in history in kayfabe. https://www.youtube.com/watch?v=XjPrdeNoSd8 Edge must have known that it looked bad, too, because he attempted to switch to about a dozen others over the years. The Edgecution, Edge-O-Matic, and the Edgecator all ended matches for a hot minute, but all of them were better than his original finish: the Downward Spiral. It was an inverted Russian legsweep, which never looks good.