Hm...
I know a few, but I have watched a few episodes of 'Paranoia Agent', and it's pretty interesting but can be highly disturbing. It's got a bit of nudity, but seeing that あなた could watch Elfen Lied, I don't think it'll be a problem. xD But yeah... I mean, it's もっと見る interesting that it was creepy, but I'll admit to saying that it can leave あなた feeling really uneasy. It's very hard to explain, so I'll just link あなた to this:
link I also know あなた can watch it subbed on YT.
Another good one is called 'Paprika', and it's によって the same director as 'Paranoia Agent'. It's one of my all time お気に入り アニメ movies, and it's about a doctor that jumps into people's dreams to solve their troubles and mental struggles that they are dealing with. (I watched the full movie on YT as well.) It's very... surreal, but good.
The video I 投稿されました below is the trailer for 'Paprika'. I'm pretty sure that it's floating around either dubbed または subbed on YouTube somewhere. I know for a fact that 'Paranoia Agent' is all on Youtube.
Hope that this helps あなた out!