Solich - maintained continuity and culture. Had only one rough season. Won our last conference championship and had the Huskers playing for a national championship.
Callahan - Retained Turner Gill for one season.
Pelini - got some of the band back together and had conference championship contender teams most seasons. Played for 3 conference championships in 2 leagues in 7 seasons. Told a vocal minority of the fan base what the majority of us were thinking. Tried to expose Shawn Eichorst before it was cool.
Frost - No-nonsense and knows what good football is. Has the support of the overwhelming majority of the fan base. Gives us our best chance to get to championship football before Osborne leaves this earth. Looks like he'd still run over and through linebackers if given the opportunity. Years ago saw him at a Council Bluffs casino with a chick on each arm... my kinda fella.
Edit: Oops, forgot Riley.
Edit 2: No I didn't.
This isn't going to make some people happy.