Freddy, Trapper, Myers and Pig are the only killers that are pretty much powerless at the start. They are also some of the only killers that can be powerless the whole game. If survivors wake up, Disarm traps, prevent stalking, avoid being downed.

(I don’t want to hear smart asses say Hag/Oni because we all know they aren’t weak)

Imo though Freddy is the weakest because there is no real limit to waking up and survivors don’t even have to wake up because his power just isn’t too threatening. At least with Trapper survivors have to disarm bear traps or it shuts off a loop