After reading through this thread I had to reflect on the book, the "the .000001% wrestler". There is a chapter that addresses this very topic. "To go full Croton or not to go full Croton" (chapter 16).
Chapter 16, talks about Milo of Croton and his coach Diotimus. Was he the best coach ever? Diotimus surely should be considered the best coach, the results cannot be denied. He literally gave Milo the cow. He literally trained the greatest wrestler ever. He trained Milo in the dirt circle daily, but did his lessons fail to extend beyond the dirt circle? Did Diotimus' full Croton coaching approach lead to the death of the greatest wrestler ever?
What we do know:
Diotimus didn't teach the champion to be cautious. He didn't teach him that lions are scary. He didn't teach him that ripping stumps in half for the ladies was a waste of time (Both huge mistake imo, this should be taught to all our wrestlers day 1!).
So with this thread, are we talking about the best coaches or the winningest coaches, because those are two very different things.