Is six times obsessive?
Had to see it again and again and again because Hugh Grant is SO DANG SMOOTH.
Lots of fallacies hither and yon, but a web so deftly spun that by the time filaments are seeable it's way beyond game over.
Read more here.
Granted, Heretic isn't NEARLY as broad or sweeping as most of these, but its general vibe reminds me of other 'closed-circle'/'locked-room' mysteries involving isolation, suspense and spooky character dynamics, chief among them The Shining, The Lodge, The Hateful Eight, Misery, Snow Falls, Dead of Winter, And Then There Were None, Murder on the Orient Express, The Thing, The House on Haunted Hill, Panic Room, Cube, Identity, The Mist, Green Room, Carnage, Rope, Snowpiercer, The Lighthouse, 12 Angry Men, Ten Little Indians, or even fables like Hansel & Gretel and Little Red Riding Hood.
I love these sorts of stories, and Heretic even serves its with blueberry pie!
