This would be a fruitful exercise of program strength/depth through the eras to do a 5th-team all-time team.
It would be a big job, actually mapping out your top 4 teams of all-time first, then who is next one up?
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I think the QB quality across programs would vary wildly. Some school's 5th-best were all-american caliber guys and other's were Joe Schmoe.
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Plus, they wouldn't all be super-teams. That's a prediction, but I think we'd be surprised how weak the 5th-best-DE pair-ever winds up being for some programs.