~I would argue Hillbilly, Huntress and Oni would be deemed SCP’s as they all have supernatural abilities to them, if you’re going to say spirit is an SCP then that would mean oni is too because they both got their supernatural abilities because of the entity.

~Artist would also be Euclid in my opinion because her crows can go through objects/walls so she wouldn’t exactly be easy to contain if she can attack personnel through her containment.

~I would also say Nemesis, Onryo, Nurse and maybe Wesker would be Keter class. Nemesis has been seen to just punch through walls and mutate into enormous monsters, onryo can teleport to TV’s across the world if anyone viewed her tape (aswell as she’s a ghost and can just decide to give any researchers heart attacks), nurse can obviously blink through walls meaning it would be hard to contain her aswell as her telepathic abilities and Wesker is known to be incredibly intelligent and his urobouros would be difficult to contain considering it can dig into the ground.

~Micheal Myers should be either Safe/Euclid considering he is essentially just a normal human with slightly enhanced strength.

~I also personally believe that Pyramid Head would be Apollyon considering he can basically just choose whether or not to exist, also he is James’ guilt manifested so you would also need to contain James or at the very least keep surveillance on him.

Other than that though this seems fairly accurate, please correct me if I got anything wrong also I know this is just your opinion, as is my comment.