Sorry man.. MM has this by a long-shot.
I saw MM in his early days more than once. He toured with Korn and they used to compete to see who could shock the crowd the most.
Well... At one of the shows I saw, MM started cutting himself with a broken bottle. No tricks. Real cuts. I was backstage watching it right in front of me. He was wearing buttless leather..Um.. Stuff. With his junk hanging out. And he shoved a water bottle IN his... Rectum. And walked around the stage with it..Um.. Still IN there.
So let's recap..
Bloody with real self inflicted open wounds, and walking around (pretty much naked) with a bottle in a place nobody on this forum would ever put one.. At least I hope..
PS.. Where's Rammstein on this list??