Here is the "best" team BYU has beaten each under Bronco. Best is being defined as the team with the most wins.
2014: Houston (7-5)
2013: Utah St (9-4)
2012: Utah St (11-2)
2011: Tulsa (8-5)
2010: San Diego St (9-4)
2009: Utah (10-3)
2008: Air Force (8-5) (*Northern Iowas [FCS] was 12-3)
2007: Air Force (9-4); New Mexico (9-4); Utah 9-4) (*Eastern Washington [FCS] was 9-4)
2006: TCU (11-1)
2005: New Mexico (6-5); Colorado St (6-6); (* Eastern Illinois [FCS] was 9-3)