The structure of the Bonanno family is a little hazy. Here's what I have.
Underboss
Angelo Caruso - 1931, stepped down
Frank Garafolo - was Bonanno's choice, had Carlo Tresca killed, eventually moved to Sicily
Carmine Galante - 1956 - 1962, jailed
Consigliere
Frank Italiano
Phillipe Rapa
John Tartamella (the only one who lasted)
John Morales and Frank Labruzzo were defacto administration members, and were administration members during the Banana War.
Did Bonanno have his first two Consigliere killed?
when the Castellamarese war ended, Frank Italiano tried to be elected Boss by the members of the Family but did have enough support. He was clipped in 1935, around the same time as Nicolo Gruppuso. they most likely were conspiring a coup. Fillipo Rappa was his replacement but was demoted in 1940. He was whacked around 1945 for "unknown" reasons. (probably was subversive and getting demoted was just the warning)
