Baker has one Heisman and no championships. He has more passing yards--but on yards per attempt and completion percentage, the two are pretty much dead-even.
Had Tebow been in a pass-first offense like Mayfield was, the stats would've been pretty equal.
And in terms of rushing, Tebow is hands-down the better player there.
Compare Tim Tebow and Baker Mayfield careers through the years of your choosing. You can see stats, Championships, awards and more.
cfbcomparisons.com
Putting him ahead of Tebow is abject nonsense.
Couldn't find direct comparisons for Tebow vs Young or for Tebow vs Cam; but I can't see any way in which either of them surpasses him in terms of looking at college **career** comparisons.
Cam had one season as an undefeated starter, Heisman winner, and national title. It was a great season (and, objectively, better than any one year of Tebow's)...but this is a ranking of best college QBs, not best-ever one year run.
Young is along similar lines: his 2005 season was incredible and likely better than any one-year of Tebow's...but he left after his junior year; only had one title and one Heisman--whereas Tebow has two titles, one Heisman, and a finalist in another year. Tebow's 4 year numbers were better than Young's 3 years at Texas.
I could possibly accept an argument that Young and Cam were more electrifying players in their prime; but Tebow was the better leader for his teams and has better career numbers. To not rank him the best is ridiculous.