Herbert at least wasn't a college one year wonder but he was wildly erratic i.e. jekyll and hyde at Oregon.
Burrow is the definition of one year wonder. Was a nobody before he transferred and had a magical season driving the bus for a historically great dream college team.
Tu'a was a successful multi-year starter for the best college sports program and best-coached system which isn't even known for QBs in the first place, but he kicked that Alabama offense up another gear as opposed to say, the Sims and Coker days of QB bus-driving and relying on the running game (i.e. Henry, Drake, etc) and the almighty Bama defense to win games. He drove Jalen Hurts off the campus and out of the conference. He was a stud and one of the greatest college football stars ever until he was hit with the injury bug, leading to Bama missing the playoffs for the first time in a generation.