Utah has beaten #18 Michigan and Oregon (ORV).
Texas A&M has beaten ASU (ORV), Arkansas, and Mississippi State (ORV). Alabama has beaten #19 Georgia and Wisconsin. Florida has beaten Tennessee and #14 Ole Miss. Northwestern has beaten #14 Stanford, Duke (ORV), & Minnesota.
Of all these teams, I would rank impressive wins as follows:
1. Northwestern
2. Texas A&M
3. Florida
4. Utah
5. Alabama