I thought Hoffa (1992) was a fine film. But you have to be ready to throw away historical accuracy in that movie as well. Nicholson was Nicholson, and Danny DeVito, who directed as well, surprised me with his acting chops. But I think the film's strongest performance came from Armand Assante, based on a composite of Tony Provenzano and Tony Giacalone. That he went on to portray Gotti EXACTLY the same way isn't surprising. Because Assante has a knack for playing those roles exactly the same. A little one dimensional but powerful.
Some actors are meant to play certain roles; Assante is one of them: gangster. To me his portrayal of Gotti is like Brando's portrayal of Vito. Noone should ever play Gotti again except Assante. His rapid fire speech pattern is something I always look forward to hearing.
