Your analogy doesn't hold up all the way, Olivant:
Yes, Profaci was one of the five original Dons made by Salvatore Maranzano after his victory in the Castellemmarese War of 1930-31. And he was Bonanno's strongest ally. But he was never subordinate to Bonanno. He had his own family at the same time that Bonanno had his--whereas Clemenza had been subordinate to both Vito and Michael. Also, Profaci was dead by the time Bonanno plotted to whack Lucchese and Gambino. Bonanno's partner in that plot was Joe Magliocco, Profaci's successor and brother in law. And, as was revealed after he died, Bonanno's big business was drugs, the antithesis of what Vito stood for.