Id have to say Bugs Moran takes it.

There have been some Italians who were monsters(Pitera, DeMeo, Mirra, Mad Sam, etc.)and of course Iceman Kuklinski and Barboza were animals as well.

But I read some stuff about Bugs Moran and it is truly insane. He was definitely deserving of his nickname.
The worst thing I read was that he hung a man by his balls with piano wire and burnt his eyes out with cigarettes.


So if you have any other stories of guys who crossed the line from gangster to monster, share them here.