Hundley isn't very athletic IMO. I can't see anyone biting on a zone option read with him. Also, I think he has a slow delivery, doesn't feel pressure very well and has been more inconsistent than Tannehill.
Dak Prescott has a long way to go before I would consider him an NFL type QB. QBs that run first have a tendency to get injured in the NFL or lack the ability to scan the field after their first read...and then they run.
Marshall...see Prescott...and he's small...also, has a serious hitch in his throw. Only completes about 55% of his passes and that's that he's a threat to run and has guys running wide open most of the time. He reminds me a lot of Michael Vick...and that's not good.
Golson...see the two above and add to that he's small.