I nominate Nidia. She really had nothing to contribute - almost no experience, no "born into the business" pedigree, not particular attractive or charismatic. In baseball, there are 5-tool players. In wrestling, Nidia would be considered a no-tool player.
...or maybe I'm wrong. I don't think I've ever seen one of her actual matches and I don't want to change that.
Nidia was awesome as Jamie Noble's valet/ white trash girlfriend.