I just noticed, that I`ve seen way too few Horror films, and most were bad. 
Also, it`s very hard to categorize for me which film is "Horror", and which not...

The only ones I can recommend are:

1. Possession (West Germany, France / 1981 / Andrzej Zulawski)
2. The Shining (UK / 1980 / Stanley Kubrick)
3. Kuroneko (Japan / 1968 / Kaneto Shindo)
4. Dracula (UK / 1958 / Terence Fisher)