Good point. Also the Wild Bunch was larger than Jimmy, Harry and Butch. They were the leaders, but they controlled Gerald Scarpelli, Jerry Scalise, Lenny Forresta and a few others. They used to hang out at the Survivor's Club on Taylor Street before Marco D'Amico took it over when they went to prison in the 1970s.
I think those were just the core members, the heavy hitters. But they all had guys under them, probably. Bob Cooley wrote in his book that Butch and Tony Borsellino(another main Wild Bunch guy) always tried to one-up each other when they were out with their guys. Each of them had "large crews", and would try to bring more of his guys than the other. Butch would call ahead and ask how many guys Tony Bors was bringing. If he was bringing 5, Butch would bring 7, then next time Tony would bring 9 or 10, and so forth.
