21. Johnny Manziel (2012)
Even during his highly scrutinized and controversy-filled redshirt sophomore year at Texas A&M, Johnny Manziel went from a frenetic but magical Heisman Trophy-winning quarterback to a legitimate NFL prospect at the position. At his best, he was the first quarterback in NCAA history to pass for 3,000 yards and run for 1,000 yards in a single season. At his worst, we all knew about his off-the-field habits and proclivity for bending (or breaking the rules).
Nonetheless, when he was on the field, he was the personification of “organized chaos,” with the ability to make something amazing happen when everything started to break down around him.