The Boogeyman
He’s the Bogeyman and he’s coming to get you! While yes, the eventual portrayal of the Boogeyman became a comedy act, the initial arrival of the character was downright horrifying. When his music hit, the lights went down, and the Bogeyman shook on his way to the ring, writhing with live worms hanging out of his mouth, it was a truly creepy scene to behold. Then, when he fed those live works to his victims, it was utterly disgusting. While we look back on the Boogeyman and giggle, don’t forget how scary he was initially.
Source: https://www.gamespot.com/gallery/the-10-spookiest-wwe-wrestlers/2900-3853/