Even though Stai is a sentimental choice, I had to go with Steinkuhler.
From huskers.com: Among the top offensive linemen ever to play at Nebraska, Dean Steinkuhler anchored a line that paved the way for the nation's leading rushing offense in 1983 before sweeping the top awards presented to linemen.
As a senior that season, Steinkuhler won both the Lombardi Award and Outland Trophy...Steinkuhler's No. 71 jersey, along with Rozier's No. 30 jersey, was retired following the 1983 season, in which the Huskers ran for an average of 401.7 yards-per game, while also leading the nation in scoring, averaging 52.0 points per contest.