Paulie Walnuts. As all of you know he was a real associate back in the day.

Richie Aprile is another one.

Joey Zasa

I even give a vote to Tony Soprano for being a great realistic gangster.

Also Pesci, Deniro and Liotta all played great realistic gangsters in Goodfellas. I could easily see three of them being real life gangsters.

Also honorable mention goes to Alejandro Sosa in Scarface. Even though he was a cartel leader and not in the Italian mob.