Nope.
Nebraska can't win any more because:
(a) not much talent within a 500 mile radius of Lincoln,
(b) leaving the Big 12 hurt them in Texas recruiting, and
(c) their 80s / 90s recruiting strategy can't work in modern game
They've had some good coaches (Pelini, Frost) and some bad coaches (Callahan, Riley), but it's going to be extremely difficult for them to ever get back to 80s / 90s levels due to the recruiting difficulties there. Even if they hired Nick Saban, they'd still struggle to win the Big 10, much less a national title.
Tennessee, on the other hand, actually has better recruiting fundamentals now than we did back in the 80s / 90s. Not saying we should be winning as many titles as Saban, but we probably should've won at least 2 over the past 2 decades with the improvement in our recruiting environment. Our problem has just been bad coaches. I think Bo Pelini and Scott Frost both would have / had success here. Much easier to recruit national title level talent here; and in fact, we have done that at times (see 2015 / 16 --- where we underperformed with an absurd collection of talent).