I've always loved The Creeper as he's one of the most unusual characters around. Created by the great Steve Ditko, he's the alter-ego of journalist Jack Ryder. He's basically an amalgamation of Joker and Spider-Man. You'd think with that creator and the mix of character traits he would have found more success.
There have been numerous takes on the character over the years. Sometimes it's all an act put on by Ryder, sometimes it's insanity, sometimes he's an actual demon from hell, and there's that unfortunate New 52 take when he was a Japanese oni. I personally think the version of The Creeper that appeared on Batman: TAS was a great blueprint on how to do the character. He was a lot like Freakazoid.
(here's a fake team up cover)
I loved The Creeper's recent appearance in DCeased: Unkillables. He seemed a lot like the "loony" version from TAS.
It is kinda odd that he's been portrayed as a villain or at least siding with the villains in Doomsday Clock and here in Unkillables.