Is Oldboy horror?

[LolliePop]

So horror villains have free-range between reality and fantasy and thriller villains are confined to realty based actions?

Confined is a strict word, but there is a consistent element of the possible, no matter how thin. In horror that is broken. Jason is a stalker but you can kill him as many times as you like but you know he's coming back. If Hannibal Lector is truly dead, without some human-based escape loop hole, he's not returning from the grave.

And who said Gremlins was horror? Does that mean Count Von Count is too?