Staubach may be the best example of a late entry qb and the Cowboys got half a career from him.
Tannehill played in the WCO at Texas A&M under Mike Sherman. I would say he fits best.
Osweiler is an interesting prospect. Quick over the top release, reads defenses well, strong arm - good touch, played the spread in college. His draw back (by some) is his height at 6'7"240. I don't see that as a problem. Cam Newton is 6'6".
He could be had in rounds 2-4. He needs some work, but his upside is greater than Devlin. He would not solve our QB problem this year, but for the price, he might be a diamond in the rough.
Ideally, I would like to see Manning or Flynn, Moore, Osweiler.
I am afraid we will see Moore/Henne/Devlin
I think Weeden will be drafted before the #8/9 pick out of QB desparation, and we end up passing on Tannehill because he will be a reach at #8/9. He will get drafted before we select again in round 2.
G.J. Kinne would be nice.
Tannehill is the obvious choice as others have stated. Weeden is the most probable to start as #2 on the depth chart then do what Ponder did last last yr.
Further, Foles or Relf (Mississippi St) as the 3rd stringer/developmental QB is IMO better than Devlin.
Winning without ethics is not winning at all - Don Shula.