The Sixth Sense (1999)
Easily one of my favorite films of all time (completely disregarding genre) this movie combines action, drama, and horror to pull you into the plot.
Shock factor is huge in this film, so brace yourself for a few jump scares. Likely you have already heard about the ending but don’t avoid this watching this movie simply because you think the novelty value has been ruined. Speaking from experience, I knew the ending already but I was absolutely astonished by how this movie made it not even matter.
Give it a chance! You will not be disappointed.