Any thoughts on who (or what) would be the next best person, family, heist etc to base a good mafia movie on?

I'm thinking the Gemini Twins would be good..think a deMeo movie was discussed but doesn't seem to have come to anything... there would be a fair amount to keep the movie going as well..GTA, middle eastern contacts, double crossing cubans, forced to whack close friends, the westies (also would be a good movie)..