Greatest Finisher Ever in terms of importance?

[Emperor Smeat]

In your opinion what would be the greatest finisher ever in the history of wrestling in terms of importance?

It wouldn't be completely based on how it looks such as Mike Awesome's Awesome Bomb looks better than Hogan's Leg Drop but the leg drop ended up being more important or influential in wrestling history.

Also it doesn't have to be limited to only 1 wrestler such as the Ace Crusher branching into the Diamond Cutter and RKO as finishers. As well as only counting when done as a finisher and not as a regular move like the DDT being a finisher with Jake Roberts but now seen as just a normal move.