#4 Alicia Fox
Previously dubbed a "crazy" person on WWE TV, Alicia Fox could be a Superstar suited to play the role of Sister Abigail on TV.
Fox's current WWE status is very much in question at the moment, as she was involved in what was described as a drunken altercation with Travis Browne over WrestleMania 34 weekend, and was most recently allegedly involved in another alcohol-related situation which led to Arn Anderson being released from WWE.
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While Fox's WWE future does not seem bright, it's possible she could return to TV at some point, and perhaps playing the role of Sister Abigail might be a good change of pace for the talented Fox, who is seldom used on WWE TV.
It's important to note that the role of Sister Abigail does not have to be a literal sister to Bray Wyatt, and could be the result of some type of mad indoctrination, so any talent with a storied past in WWE could logically make sense as Abigail.