I’m not sure if you considered this at all, but Springtrap is the only completely human character (I think) which would explain his odd jumpscare. While this jumpscare doesn’t necessarily make you jump, it’s really creepy when you consider the more human-like approach to seeing the security guard
I completely agree that Spring has the worst jump scare but you have to remember and scott did do this well, is that springtrap is about 45-60 years at the time in a decayed suit with nothing but decayed muscles and bars holding him up so his jumpscare wasn't meant to be scary because of how old he was.
I completely agree with springtrap, he just smiles at you and barges in with the worst capcut audio and to be fair, it is one of the funniest other than foxies obviously. I dont agree with fnaf 1 golden freddy i just think having a PNG image and some disturbing noises is scary which is why at least i would give cassidy some credit.
For me, I’d say that Mangle has to be my favorite jump scare. Even tho I absolutely hate FNaF 2 with a burning passion, Mangle’s jump scare was unique since they swing from the ceiling to kill you