I gotta go with "Lucky" Luciano. Along with Meyer Lansky, they pretty much laid the groundwork for what La Cosa Nostra was to become.

Frank Costello ranks up there, too.

Al Capone is perhaps the most recognizable gangster.

"Growing up my dad was like 'You have a great last name, Galifianakis. Galifianakis...begins with a gal...and ends with a kiss...' I'm like that's great dad, can we get it changed to 'Galifianafuck' please?" -- Zach Galifianakis