In my opinion, Gerry Godowski was our very best all around QB . Ganz threw a lot more INTs and I view those as very negative stats. I would rather see the completition% drop some but get the INT numbers way down. He was a tremendous athlete with great speed, good, careful and accurate passer, smart, etc. He only played the one season so his numbers were limited by that as well as by the offense type some.
Ganz was good. But the stats fail to indicate the won/loss % for the team he was the QB for. You can throw for 10,000 yards but if the team is not winning, then you have to discount accordingly. First and foremost for any player, he must be a winner! Certainly, all players at all positions have to judged that way but most especially for the QB who is the 'trigger' man in charge of getting the team in the right plays and putting the other offensive 'skill' players in positions with the ball to make successful plays.
Sometimes the QB have massive yardage is NOT a good sign. Example is Eric Crouch. He had too many rushing yards as the result was he became the primary yard gainer rather than the commander of the offense who distributed the ball (ala Tommy Frazier). I consider Tommy Frazier and Turner Gill as our most successful QBs. Gill would be my pick if I had to choose one guy to run 'any' type of offense. He was a gifted athlete. Great arm, careful, smart, excellent runner, field general, a coach's mind, etc.
I would build my hypothetical offense around Gill /Frazier and Godowski. Those would be first, second and thrid string QBs.
I don't think Ganz makes my top ten. But I want a QB who is athletic and can run well. I am not sure I would take Ganz over Tommy A. I would put Taylor Martinez (as a Freshman) in my top ten certainly. But not top 5.