The top 150 HCs in history made me peruse the records and here are some tidbits I thought worthy of sharing....
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Here's a list of HCs by win%, but including only those HCs with more wins that anyone above them.
.881 Knute Rockne, ND (105 wins)
.864 Frank Leahy, BC, ND (107)
.854 Urban Meyer, BG, Utah, Florida, OSU (187)
.836 Tom Osborne, Nebraska (255)
.780 Bear Bryant, MD, UK, A&M, Alabama (323)
.749 Joe Paterno, Penn St (409)
So basically, these are the best HCs of all time, balancing out success x volume.