So, who's the scariest person in wrestling to you? I don't mean, "This dude could kick my ass" scary. I mean, "This dude may murder me" scary. Like, I know Mark Henry could totally fuck a lot of people up, but he seems like he's a good guy.
My pick is Mr. Donnie. I could totally see this scenario* where he convinces a fucked-up Tommy Rich that they should break into Lawler's house. Nothing big, just steal some shit he doesn't need to fence for drugs. They get there, and Lawler's unexpectedly home and Mr. Donnie calmly kills him while Rich freaks out. Now Donnie has Rich by the balls and it's all downhill from there.
*This may be related to the fact that I recently saw Martha Marcy May Marlene. John Hawkes' character gives me a Mr. Donnie vibe.