I know anthony casso was considered a very nice guy as is steve crea and nicky scarfo sr.
What about frank locascio , vinny basciano, and chin gigante?
I heard neal delacroce was not a nice guy. Forget where i heard it but Delacroce supposedly slapped ozzy osbourne around because he made fun of frank sinatra. Gave him a black eye and a bloody lip. Had to be in 1982 or something.
He made ozzy sing a sinatra song or something.