#2 Gail Kim
A six-time TNA Women's Champion, Gail Kim was grossly underutilised in the WWE. Debuting at a time when WWE was looking at alternatives to Trish Stratus and Lita, Kim promised exactly that.
She debuted following a number of Matrix-inspired vignettes and was very athletic as the hype suggested. She went on to win the WWE Women's Championship in a Battle Royale on her first night on RAW.
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However, WWE lost faith with the future PWI ranked best female wrestler in the world. Kim lost her title to a cold as ice Molly Holly on RAW and was never considered to be a serious contender for the title again during her two separate stints with the company. She asked for her release the night she infamously eliminated herself from a #1 Contender's Battle Royal match on RAW in 2011.
Kim went on to TNA, creating history as the joint record holder of most Women's titles and was even be inducted into the TNA Hall of Fame. She recently had a match at GFW Destination-X PPV.