No disrespect to you, PosImpos, but I think that Pop is a better coach than Doc because the Spurs had the Big Fundamental fall into their laps vice ours in the draft.
Doc is not the best coach, but I believe he is under-rated sometimes.
Tim Duncan and Greg Popovich have made each other. I don't think you can say it's definitely one or the other; neither of them would have had the career they've had without the other.
That doesn't mean Duncan isn't the greatest PF of all time or that Pop isn't a really good coach.
It takes great players and great coaching to win championships; Jackson and Auerbach wouldn't haven't gotten so many rings without M.J., Kobe, and Russel. However, though they probably would've won some rings anyway, I would argue that none of those players would have won as much as they did without those great coaches.