I won't try to defend these as good recs, and they're not horror movies, but i am reminded of the antagonists from lord of the rings.
and there's an episode of misfits that made me think of the Jason from halloween trope
When discussing Jason psychologically, Sean S. Cunningham said, "...he doesn't have any personality. He's like a great white shark. You can't really defeat him. All you can hope for is to survive."
(but i don't think watching the ep in isolation would make much sense)
Did Bojangles post No Country For Old Men? AC has that 'slow but unfailing guided missile' energy.
Slowly moving physical threat that always knows where you are? I'd say It Follows is probably the only one to take that idea so far. But there are plenty of movies about supernatural curses that might be what you are looking for, except they are usually not physical.
I'd say Ringu is a good pick then. And The Thing.
Maybe Prince of Darkness.
Matango.
Night of the Demon.
Viy (1967)
Demon Knight
The Masque of the Red Death
Bewitched (1981)
Any of the Blind Dead series, except for The Ghost Galleon.
The Monolith Monsters
Lake of Dracula
Honestly? Most of these will disappoint you. I'm just throwing a few that might get close to what you mean.
And thank you everyone for all the attention you have given to this quest. I am looking forward to sorting through all your recommendations and will gladly let you know what came about. Cheers.