Being tall doesn't make you a good quarterback, it just makes you tall.
The only quarterbacks in this draft I would be interested in are Matt Barkley and Ryan Nassib. Not sure the team will have the cajones to pull the trigger on another USC product despite the fact that Barkley has a lot more of a track record than Sanchez. Nassib will need to be in the right scheme but has the look of a poor man's Aaron Rodgers.
The tall quarterbacks in this draft class are fairly horrendous.