16. Bugsy Siegel
Bugsy Siegel was an American mobster and founder of Murder Incorporated, who headed the Genovese, crime family. He was known as one of the most feared gangsters who was ruthless to people we worked with. He was in charge of some casinos in Las Vegas back in the 1940s, and later he became a bootlegger. Bugsy killed the Fabrizzo brothers as well as the Amberg brothers.