It is impossible to remember and name all my favorite scary movies but I have seen and enjoyed The Entity. I don't remember that I found it very scary.

It Follows is on my to see list.
Audition is one of these movies that I find too nasty/ painful to enjoy and rewatch. So I did not mention it. I experience that with many Asian movies. Especially with movies that involve some kind of torture, bodily mutilation.

Halloween (1978) is one of my many favorites too, the same goes for Eraserhead. I don't find the latter scary, so I did not mention it.
All those movies you haven't seen are definitely worth watching ;)

Have a nice day!