Just for "something completely different", how about picks for the best Comedic Mob or non Mob movie ?
I'll kick it out with two:

1) Wise Guys-Danny DeVito & Joe Piscopo

2) The Gang that couldn't shoot straight (rumored to be loosely based on the life of Joe Gallo)- Jerry Orbach & and a young Robert DeNiro. (1971)

This was one of the earliest DeNiro roles.Two years later he did Mean Streets,and a year after that Godfather 2.