Stalker FF films?

I really enjoy the stalker / voyeur sub genre and would like some recs. My favorite FF movie is Ratter (2015). I already watched:

The den, both Unfriended, Followed (2015), missingcouple, the Andy baker tapes, Megan is missing, ratter, alone with her, 388 arletta avenue, peeping Tom, hangman.

I’ve been looking around but can’t find many more. The more similar they are to Ratter, the better.