Though I love movies like The Void I don't think they're really pshychological thrillers. I agree on Chaser and Stoker that are Korean masterpieces.

I suggest Honeymoon : low budget but amazing.

http://3.bp.blogspot.com/-y36fsDF8tc...1600/Nahwi.jpg

The Sentinel (1977), which is the same theme as Rogue One, the Star Wars spin-off

I Know What You Did Last Summer, which is the same theme as Best of the Best 2

The Conjuring 2

Annabelle Creation

The Exorcism of Emily Rose


Non-horror films

Nocturnal Animals

The Master (2012) - which is the same theme as Interview With The Vampire

GoldenEye