For the MVFC, are we talking just the MVFC years or back to the original Gateway Conference days?
I know that most of his coaching years were before the Gateway was founded, but I'd have to put Darrell Mudra up there. He went 24-6 with NDSU, 39-13 with WIU, 47-15-1 with EIU (they were Gateway members from '85-'95), and 43-16-1 with UNI. 153-50-2 total record with 4 different teams that are or were conference members. Is in the Athletics Hall of Fame at all four schools:
https://gobison.com/honors/bison-ath...rell-mudra/153
https://goleathernecks.com/honors/ha...rell-mudra/167
https://unipanthers.com/honors/hall-...rrell-mudra/84
(EIU's HOF site sucks, I'm not linking to that)
Beyond that, I'd have to go with Mark Farley...23 years at UNI, the winningest coach in conference history, has a record of 179–101 (.639) in that time...essentially an "average" of 7-4 every year and 13 I-AA/FCS playoff appearances.
Next up, probably John Stiegelmeier. 26 seasons at the helm of South Dakota State with a 199–112 total record, 131-61 over 15 years in the MVFC. Took a decent DII school up to the FCS and eventually to the MVFC, where, in 15 seasons, they had only two under .500, with 12 playoff appearances, appearing in two championship games, and going out on top with a championship win in his final year.
The 4th would probably be Craig Bohl...104–32 in 11 years at NDSU and in 6 years in the MVFC had 1 under .500 season, 4 FCS playoff appearances, winning the championships in three of them, and kicking off the Bison Dynasty that is only now starting to show a few cracks.
Honorable mentions of:
Terry Allen - 75-26 in 8 years at UNI with 7 playoff appearances, plus 37-64 in 9 seasons at MSU
Randy Ball - 64-41-1 in 9 years at WIU with 4 playoff appearances, plus 34-42 in 7 seasons at MSU (what is it with MSU taking good coaches running them into the ground?)
Chris Klieman - 69-6 in 5 years at NDSU through the height of their dynasty. Is 6th all-time in wins by Gateway/MVFC coaches despite only being there for 5 years. Won 4 championships and "only" made it to the semifinals in the only year they didn't. On the conference all-time wins list, the fewest number of years that anyone ahead of Klieman has is 14 (Spack at ILSU).