High-Rise is good. But Cronenberg's Shivers is even better.
A man keeps a young boy locked in his basement. That sounds like a horror film, but it is not. It has a naturalistic atmosphere and great character development, the man is someone that could be your neighbour. My first impression was Haneke (the director) meets Misery (the film). The ending is superb. Recommend if you like slow films with a disturbing undertone.