Good question. It would take a lot of work to put a comprehensive list together.
Besides Gotti and Locascio, Gravano helped put away 7 Gambino captains and I don't know how many soldiers and associates. He also helped put away guys from other families including Chin.
I remember there was an article about while back that showed the photos of all the guys Sal Vitale helped put away. There must have been at least a couple dozen.