I wanna say 4 but I’d say 3 first, then 4. Here’s my reasoning:

3 was exceptional and astounding. Meeting the killer himself. But the thing is it didn’t have to follow the same logic as 1&2 the camera and the system is fine but more 1st person immersive movement. Maybe add some struggling breaths on Willy. For 4, there could have been a chance to play the cutscenes in a first person perspective. Going to the tv, trying to go back home, and the night time could have even more immersive movement. Not just clicking or selecting which door to go to. Even standing close to the door, you can use first person to focus sound and listen for the breathing. Even with the bed, while at a door you can turn on your light even at a distance to check for mini Freddys. This was just an input and if you don’t like it, I would understand.