The problem with that evaluation is that it is too narrow. What I have found, going back to 2005, is that the team that wins the national championship (except for VY in 2005) is the team who has recruited better overall talent the preceding 4 years.
Compared like that, it is impossible to isolate the QB alone as the "reason" for the win. In fact, most teams actually had a sizable talent gap.
Here is how it looked going back to 2005, or as far as my data takes me (the numbers in parenthesis are a four year trailing average of rivals recruiting numbers).
2005: Texas(13.5) vs. USC (4.5). Texas won (only exception).
2006: Florida(7.25) vs. Ohio State (20.25). Florida won.
2007: LSU (8.75) vs. Ohio State (13.75). LSU won.
2008: Florida(5.25) vs. Oklahoma (8). Florida won.
2009: Alabama(5.75) vs. Texas (7.25). Bama won.
2010: Auburn (12.25) vs. Oregon (18.75). Auburn won.
2011: Alabama(2) vs. LSU (6.25). Bama won.
2012: Alabama(2) vs. Notre Dame (16.25). Bama won.
2013: Florida State (6.75) vs. Auburn (7.25). Florida State won.
So, did the team make the QB look good, or did the QB make the team look good as is your assertion?
Similarly, there have been some numbers crunched by Dave Bartoo that tend to suggest that a QB only has about a 0.2 game seasonal effect on any team. I will forward you to his cite if you want a further explanation of that (
CFB Matrix - Setting College Football's Expectations).