People have been naming them, but finishers have to look good and be versatile. DDT, Diamond Cutter, Stunner, RKO, Sweet Chin music are all A++++ finishers. You can do a slow set up and play with the crowd. You can pull it any time, while there are plenty of counters to them. And they always look impactful.
Overly complicated finishers like One Winged Angel or Canadian Destroyers are crap as a finisher. They are impressive set pieces, but don't work nearly as well for the story telling as they have to follow a predictable pattern to set up. The beauty of the Stunner was it could come out of anywhere. Austin teasing that its coming, to be countered twice, then the third one is a good. Doing Sweet Chin Music when the other is going into their high flying finisher. Orton made is career solely out of the RKO being a damn near perfect finisher.
Hogan's leg drop and Rock's People's Elbow were on the too simple of a side. They were very one note in their set up and usage.