The other half of NYM here (and my colleague will probably roll his eyes) but I'll go with John Gambino when he was head of Sicilian faction of Gambinos. Smooth operator, lowkey, and loyal to a tee. Plus he had the balls to meet with the fearsome Toto Riina to help save the Inzerillos. I also second The Other Guy with Tommy Lucchese for all reasons stated above and also because of how he treated his men.