Licensed Killer Idea
I am blissfully unaware of how licensing works but hear me out.. John Carpenter's The Thing. Not a competitive killer, but a fun one. If you haven't seen the movie, basically a shape-shifting alien that can assume the appearance people it kills is wreaking havoc in a research outpost somewhere in Antarctica. Great premise, right?
Ability: Transform into the character model of any survivor you injure. Store up to two genetic copies and lure the others into a false sense of security and strike at the perfect time. Run and Crouch like a survivor, interact with generators, chests, and other world objects.
Perk 1 - Where did it go?: After hooking a survivor, all other survivors within your terror radius suffer from blindness and oblivious for 5/10/15 seconds.
Perk 2 - It's not human: You can start the match as a random survivor.
Perk 3 - Assimilation: Any survivors repairing a generator you interact with are instantly faced with a difficult skill check. Generator progress is slowed down by 1%/3%/5% while you "repair".