One guy that hasn't been mentioned is Valachi, although it might just be semantics because he was made prior to the Five Families being divied up.
I´m not exactly sure what you mean by "he was made prior to the Five Families being divided up". But prior to the Castellammarese war, the Five Families had already been established. The bosses were Masseria, Mineo, Reina, Schiro and Profaci. During the war, former Masseria loyalists switched sides to Maranzano´s. I guess one can argue that the New York Mafia consisted of two factions by this time (actually three because Profaci was considered neutral) but the NY Mafia was still de facto structured into five different Families.