Gambino was a "labor consultant." Costello admitted to being a gambler. Castellano had wholesale meat and poultry; Gravano was a drywall contractor--both were legitimate businesses. Bonanno claimed to have a cheese manufacturing business in Wisconsin. Gigante was a professional psycho.
My favorite was Joe Colombo, "real estate salesman." New York Times interviewed his "employer," Joseph Cantalupo (himself a Mob guy), who said: "Mr. Columbo has the sincerest group of customers. No one ever tries to cheat him out of a commission."