What is the perfect eerieness?

[Googolplex]

Here are a lot of people who think, that dead human bodies are not eerie.
They mean, that the real eerieness only lays in dirty dark environment with scary sounds and special effects (self opening doors for sth.) and crying children.

But is it not scary?
http://www.cinebutaca.com/wp-content/upl...t31024.jpg

I think the perfect eerieness would be achieve, if this both things are compensed together.

Dirty dark environment with scary sounds and special effects "and dead human bodies".

And it is more eerie, if this bodies can whisper or move themself.

But if this things are in a horror-game if would be a 18+ game.
But I find it good, how do you think about real horror?

That can help Frictional Games for their next games (Amnesia 2 or sth.).: