I don't know. We don't know what the model is yet or whether it would get to that stage.
It if was majority fan owned I assume the Trust board would bring someone in, most likely with the aid of Supporters Direct who would have plenty of contacts within that field.
If there's a hybrid model of fan ownership and a private individual or consortium, those individuals or groups would probably want some say on who runs the show.
Not much point discussing this yet as it's just abstract discussion without the models being presented.
Elections to the board would make the idea that cranks would get roles laughable. There are far more meritocratic systems available than the one that delivered Michael McRitchie Anthony and David Cardoza to positions of destructive and supreme influence.