Depends how we go about things. If we are picking the GM first, and letting him hire his own coach, then the GM absolutely MUST be a leader. Pioli, say what you want about him, he was the hottest name out there because he did his job well in New England. But his job was not to be a leader. His job was to go scout dudes and work with the scouting department to get info to Belichick in the style Belichick wanted. He didn't have to lead an organization. What you are seeing right now is Pioli in over his head organizationally. He's a guy who would be better served just doing the bidding of a big time coach like he did in New England.
If we go about hiring a big time coach (IE Cowher, Gruden, etc) to run the show and be the face of the franchise, then you just need to worry about hiring a personnel guy in the background who will work well with the coach and can go out and get his type of players. Good ability to negotiate contracts and organize your scouts and assimilate info, but don't need to be the strong leader type.
Without knowing more about a guy like Ross and what his leadership style is, and how Hunt would want to go about hiring a coach, it's hard to answer. Clark will probably want the front office guy to be the top guy rather than the head coach, so the danger is if you go get another young guy, if he doesn't know how to lead, we will have wasted another four to five years.
If Hunt wants to go young at GM, and not hire a big time coach, he may want to invest in a VP of Football Operations position and put in a strong, experienced and proven leader to guide the franchise along for a few years...