Try some short stories of H.P Lovecraft if you haven't.
I recommend him partly because I happen to think that he was fucking awesome, but also because he mainly wrote short stories and while most of them are in the category of "wierd fiction" they are all about something different. So you can expect a great deal of variety from an average collection of Lovecraftian short-stories.
You say you're also looking for something original in style and depth, and I'd say it's pretty hard to find anything more original than Lovecraft (although many authors after him have taken a great deal of inspiration from the man, so don't be surprised if you recognize something if you're an avid reader of sci-fi and fantasy)