To make this list, I was going to have a minimum 70% and 10 years, but opened it up to 65% and 5 years to add more than just 8 Coaches to the list. Information was gathered from a thread that @Lucky#7 and I have been doing. This list is also of current coaches as of last season.
The Elite
1) Bishop Kelly - Tim Brennan - 23 Years - 137-32 - 81% - 7 State Championships
2) Declo – Kidd – 23 Years - 132-32 - 80% - 3 State Championships
3) West Side – Moser - 10 years - 85-22 - 80% - 2 State Championships
4) Fruitland - Ryan Tracy - 6 years - 54-14 - 79% - 2 State Championships
5) Aberdeen – Duffin - 7 years - 48-15 - 76%
6) Weiser - Tom Harrison - 34 years - 261-89 - 75% - 10 State Championships
7) Highland - G. Mariani - 17 years - 161-43 - 75% - 4 State Championships
8) Mountain View - J. Benedick - 11 years - 90-30 - 75% - 1 State Championship
9) Eagle - P. Peterson - 14 years - 111-41 - 73% - 1 State Championship
10) Capital - T. Simis - 15 years - 120-45 - 73%
11) Sugar-Salem - Tyler Richins - 5 years - 36-14 - 72% - 1 State Championship
12) Blackfoot - Stan Buck - 27 Years - 116-50 - 70% - 4 State Championships
13) Gooding - Cameron Andersen - 10 years - 67-34 - 66%
14) Coeur d'Alene - S. Amos - 19 Years - 146-81 - 65% - 3 State Championships
15) Homedale - Matt Holtry - 10 years - 63-34 - 65%
16) Firth – Drake - 9 years - 53-29 - 65%
17) Kimberly - Rich Bishop - 6 years - 37-20 - 65%
Honorable Mentions (Teams that made the % but not minimum 5+ years)
· Rocky Mountain - C.Culig - 2 Years - 21-3 - 88% - 1 State Championship
· Grangeville – Adams - 2 years - 17-4 - 80%
· Post Falls - B. Bennett - 3 years - 19-10 - 66%






Going off the information provided by @TrainingTable , in the 4 years that Coach Buck was at Bonneville, he won 1 additional game and lost 4 fewer which changed his winning percentage from 61% to 62%. Again it could be better or worse depending on his record from 94' to 03', but I have honestly spent an hour and a half here trying to research anything for those years and have come up with ziltch. I was recruited in 02' and sort of remember a gridiron .com that was kind of the Maxpreps of back then. I will try to find that website and see if it is still up and maybe additional info would be there.
With the updated 4 year gap:
Madison - M. Buck - 23 Years - 93-56 - 62% - 3 State Championships