I personalty don't find any of them scary because I read, watch and draw a lot of stuff like this so I have become numb to it, but to some people the ones that relates to them the most scare them.(mine is clockwork)
True I draw my own character alot, she is a psycho so I've become numb to it to. When I was young and just heard about creepypasta slendy and Jeff scared me alot, not anymore tho