#1 Bayley
Professional wrestling is an art-form whether the critics want to admit it or not. Some will always reject that idea no matter how hard you try and reinforce it, but that doesn't make it any less true. If you want an example, just go back and watch this match which saw Bayley, the ultimate underdog, defeat Sasha Banks to win the NXT Women's Championship.
Banks was playing the role of the bitchy heel to perfection, whereas Bayley was trying to prove that she could hang with the top female stars down in NXT. It was a match that was pretty much flawless from start to finish, and it's probably the crowning moment of Triple H's time down in developmental - which is saying something.
Will we ever see a title win greater than this? Time will tell.