Schlesinger gets a bit of recency bias. Well, not really all that recent, but maybe "memorable" bias. The guy busted a couple of critical TD runs against Miami for Osborne's first national title and those FB trap plays are pretty legendary in Husker fans' minds. Hard to look at just the stat lines and compare them based on production alone. I also remember Schlesinger rattling off some impressive runs against Colorado, if memory serves. He was a bull charging out of a gate and I remember him being the guy who broke facemasks and caused bloody noses - both his own and for would-be tacklers. He obviously also had a great career for the Lions.
However, here are their career numbers. Schlesinger is literally the least productive of the bunch.
Rathman: 1425 yards, 12 TDs (70 yards / 1 TD Receiving)
Joel Makovicka: 1143 yards, 11 TDs (127 yards / 1 TD Receiving)
Jeff Makovicka: 902 yards, 6 TD (19 yards / 0 TD Receiving)
Schlesinger: 706 yards, 6 TDs (no Receptions at NU)