New Jack, murdered several people, attempted to attack and kill other wrestlers, general sadist.
Grizzly Smith, father of Jake Roberts, impregnated Roberts' mother while she was twelve.
Fabulous Moolah, longest reigning woman's champion of all time. Aside from Hogan-esque assholery (and being single handedly responsible for women's wrestling being in the state it is), she pimped out women from her training school (which she didn't teach at) to promoters in the territories era to retain her backstage political power. Victims include Sensational Sherri, Sweet Georgia Brown and Luna Vachon. She also intentionally got many girls addicted to drugs to control them, and raped them along with her husband.
Carlos Colon, covered up the murder of Bruiser Brody who was stabbed in a shower backstage at Colon's promotion.
Invader No.1, did the stabbing mentioned above, he murdered Bruiser Brody in a shower and was acquitted under dubious circumstances.
Flawless Jay Phoenix, a smaller indy wrestler, he was caught going into public bathrooms and molesting children.
Buck Zumhoff, a notorious pedophile, he had sex with a minor and was jailed, but while on parole it was discovered he had imprisoned his daughter for twelve years and sexually molested her countless times. He also attempted to escape police custody when arrested.
Jimmy Savile, probably the world's most notorious pedophile, he was a tv host who ran a show called 'Jim'll Fix It' where he would make children's dreams come true (not dissimilar to the make a wish foundation, but the kids weren't dying, most of the time). His crimes only came to public light after his death, and spanned a period of 1955 to 2009, with 214 different criminal cases. He was a professional wrestler prior to his rise to fame, and is more famous for his tv work.
Chris Benoit, I assume you know about this, he murdered his son and wife due to brain damage resulting from years of blows to the head.
La Dama Del Silencio, Juana Barraza was sentenced to 759 years in jail after she was convicted of murdering eleven elderly women, though she's believed to be linked to up to forty deaths. She was possibly Mexico's most prolific serial killer and was also nicknamed La Mataviejitas (meaning "The Old Lady Killer")