mikey, just curious, do you mean two best coaches as far as our limits go, or overall?
I'm just going to pick the coach with (by far) the most games and (by far) most wins:
Eddie Johnston, HC
516 GP, 232 W, 224 L, 60 T
Given the make-up of my team, [undrafted] may have been a better choice, but I've always liked EJ. I think he does a good job with whatever he has to work with. And again, as far as longevity goes, nobody is even close.