24. John Elway (Stanford)
John Elway could famously demand that he wouldn’t play for the (then) Baltimore Colts in the days and weeks leading up to the 1983 NFL Draft, and not turn off all the other NFL teams with his demands, because he was that damn good.
Still considered to be among the greatest college football quarterbacks of all time, ESPN ranked Elway #15 in their rankings list of the Top 25 Players In College Football History.
By the time he left Palo Alto, Elways was the owner of almost every Pac-10 record for passing and offense in general. He was named the Pac-10 Player of the Year two separate times, and was a consensus All-American and the runner up in Heisman Trophy voting.
23. Andrew Luck (Stanford)
Another guy who passed on the chance to become the #1 overall pick in the NFL Draft as a junior, only to return to school as a senior, quarterback Andrew Luck was hailed by many as the most complete quarterback prospect to enter the NFL Draft since John Elway (who, coincidentally, also went to Stanford University like Luck).
Before Luck had arrived, Stanford had never won more than 10 games in a season; Luck led them to 12 wins in 2010. Stanford’s highest win total in two consecutive years was 18, whereas Luck took them to 23 wins between 2010 and 2011.