Sorry, but I don't think Fred would become a "consensus nominee." He doesn't have enough dynamism and charisma to win many more people. I have a dream in which the deadlocked convention listens to a speech by Hunter and stampedes to him, but realistically, that won't happen either. Probably there will be backroom deals in which some of the leaders drop out in return for big policy concessions (or VP or Cabinet jobs) from the remaining one(s).
Fred is everyone’s 2nd choice. He’s the only one who is seen as an acceptable alternative by every single faction. There is no serious opposition to him. That’s why he would emerge the consensus nominee. No one would trust any of the other candidates enough to cut deals or switch to their side. I think in the end everyone will say “what the hell, I guess Fred will do.”