I like Warhammer - the setting it rather gritty and depressing but it is more closely aligned with a fantasy version of medieval Europe where dark forces work in the shadows to corrupt and manipulate and destroy for hideous deities of nasty badness.
I would suggest First or Second Edition. I did not like the board gamey feel of Third quite so much as First and Second.
The classic adventure for First is Enemy Within which is all about corruption in the Empire - this is for 1st ed. Thousand Thrones is a single book adventure for 2nd that is pretty good. Also check out Paths of the Damned (which spans 3 books) and Lure of the Liche Lord which is a little more high level.
There are some excellent splat books for Warhammer as well as the background is pretty awesome. I like all the Chaos stuff. The original Realms of Chaos books were the classics but the new Tome of Corruption is not too bad - but I think they tame it down a little from the first edition. Slaanesh is less about sex, rape and boobies and more about manipulation for example.
I like the system because everyone starts out as a normal person and it really doesn't get much better from there. It is more about avoiding death than seeking adventure