here is a list of mobsters, who have reached top positions without having ever pulled the trigger
Angelo Bruno Carlos Marcello Santo Trafficante, Jr. Peter Milano Jerry Agiuolo Matthew Madonna Michael Franzese Nicky Scarfo Jr Frank Gioia Jr Bill Bonanno
I know that both Bill Bonanno and Michael Franzese claimed they never personally killed anyone. And maybe they're telling the truth. But I don't know how we can be so sure for everybody on that list.
I'm almost positive I've read that Angelo Bruno and Phil Testa gunned down a guy together in 1940s. Maybe it was in Celeste Morello's work? Can't remember, someone help me out here.