Sure-fire answer to Who Is The Best Coach?

Do it by lottery. Put the names in a hat and draw them completely without bias. Then make the coaches play with what they get. The better coaches will overachieve, over time, and the ones that make it on bright lights and sizzle will not. Of course, the possibility is that a coach playing at some lower level will be the best. Many of the top coaches get where they are because they can coach (more so in basketball than in football), but many are also successful because they are great recruiters, not necessarily great coaches. So make the playing field completely level, and then pick the best.