There seems to be a run on Jewish gangsters going on here, so I'll go with a more modern Jewish gangster, downtown Burt Kaplan. He was an Luchese associate that was close with Christy "Tick" Funari, Casso, Amuso, and others. He is probably most know for being the go between for the Mafia cops and the Luchese. Kaplan had rackets in South America, China, Africa, etc. In the book the Brotherhood they mention he was in a exercise club with Tommy Karate when he called Otto Heidel a rat.