Gregory Helms had dissociative identity disorder during his tenure with WWE. Eugene being the easiest with a developmental disorder of some kind. One story line had Linda McMahon with catatonic depression. Kane has sadistic personality disorder, possible somatization disorder (believing he was horribly scarred when he wasnt), alleged necrophiliac. Where to begin with Goldust, tourettes, and multitude of sexual disorders (at least in the attitude era). AJ is bipolar and has separation anxiety. the bulk of the roster has narcissistic personality disorder.
John Cena suffers from the rare and worrying condition known as "total fucking douchebag disorder".
Telltale signs include dressing like a 8 year old, wearing a shit-eating grin and thinking everyone loves you when in fact they hate you.
Sadly, there is no cure.