#2 Bayley
Prior to Bayley being brought up to WWE's main roster, the common belief was that she had the potential to become the female version of John Cena, as she was extremely popular with kids during her run in NXT. Unfortunately, that didn't translate to the main roster due to a multitude of reasons.
But now that Bayley has just recently acquired the SmackDown Live Women's Championship via a Money in the Bank cash in, it's the perfect time to turn the longtime babyface heel.
The idea scenario would've been for Bayley to be alongside Sasha Banks as the Women's Tag Team Champions, as the two of them would've made for a fantastic heel duo. But, at least for now, if Bayley is going to turn to the dark side, she'll be doing so without a partner.
But whether it's with someone or on her own, there's no denying that a heel turn would be something that could, and probably would benefit the current SD Live Women's Champ greatly.