Sinners is an absolute must-see in theaters. That one scene will have you levitating. Comes out of nowhere and immediately elevates everything that came before and everything that comes after. If you love music, you owe it to yourself to see Sinners. Just be aware it takes at least an hour, at most an hour twenty to get to the horror parts.
As for horror at home, I strongly recommend Black Mirror: Common People. Truly nightmarish, angering, and disturbing in unexpected ways. The premise is robust enough that it could easily carry a full length theatrical film.