Hi! Recently Malorie Blackman's Noughts and Crosses series has been made into a series that you can get on iPlayer, it's amazing in the way that it is so controversial yet relevant to today. If you wanted a classic, 1984 is quite an old film now, based on George Orwell's book of the same name - also the inspiration for Big Brother. In the same thinking there's A Clockwork Orange, ridiculously creepy and will play games with your head, not one to watch when you're home alone.
If you're looking to branch out into other genres, Stephen King's novels have nearly all been made into films- It, Pet Semetary etc. There are also a multitude of classics you could watch/read e.g. Little Women, Emma, The Picture of Dorian Gray.
Hope this helps!