I actually had no idea. But I have always felt that the QB winning the Heisman was as much a team effort as winning a single gam. Players often grow up with teams for which they dream to play and sign with those teams regardless of other offers. So hypnotically, If Jake Fromm had gone to LSU while Joe Barrow played at Illinois, who would likely have won the Heisman. As best I can remember, Paul Horning (sic) was the only winner from a losing team. Would either of the two Oklahoma winners have won if they played for say Kansas.
I believe that LSU would have won the Championship if it had the starting QB from any of the team that finished in the top 15.
So full circle about the requiting standing. Offensive lines and defensive front 7s win championships while QBs win Heisman. The lines are were to look when evaluating the best recruiting classes
QBs definitely get the recognition when a team is successful. I wish the Heisman voters would be more willing to vote for a lineman or a defensive player if they were truly the best player in college football. However, I wouldn't underestimate the importance of the QB position. If a team has an elite QB, it can prop that team up beyond it's talent level. If a team has bad QB play, they can be limited even with a very talented roster.