I'd say:
Goodfellas
Little Caesar
Key Largo (Robinson at his most vicious)
Al Capone (so-so movie, great Steiger)
Casino
St. Valentine's Day Massacre
Scarface (Muni)
Untouchables

Ntra la porta tua lu sangu � sparsu,
E nun me mporta si ce muoru accisu...
E s'iddu muoru e vaju mparadisu
Si nun ce truovo a ttia, mancu ce trasu.