>>10332867Objectively? It's this character here named the nurse who's ability is literally that she can no clip through the environment. She's difficult but she is impossibly strong. She is also free.
Aside from her, the bunny mask killer the huntress, who us also free is pretty amazing.
In terms of DLC, pyramid head, pinhead, the blight are all pretty amazing. But you can even make the bad killers work. Jigsaw is one of the lowest tier killers but I'm a monster with her just cause of how long I've played the game.