Surprised so many are saying the winning percentage. How many have Leon Barmore as the 2nd greatest coach? Would also note that there are coaches who don't get a lot of respect around here but have great winning percentages (hatchell).
Obviously Pat and Geno are the top 2 coaches in NCAA women's college basketball history, but I'd probably vote Barmore #3. To me, the mark of a great coach is one who can sustain excellence. Even good modern day coaches like Mulkey, McGraw and Vanderveer have had stretches of seasons where they weren't in the national picture. In Barmore's 20 years, he won a national title, played in 5 title games, 9 Final Fours, 15 Elite 8s and 16 Final Fours.
And Hatchell's winning percentage is around 73-74%, which is very good, but anywhere close to Geno/Pat/Leon.
That said, I think the combination of NCAA tournament success and winning percentage shows the ability to be successful at the highest level of competition, which to me, is most impressive. But, if we're only choosing 1, it's the 9-0 in title games.