I... I
guess I'd recommend Piers Anthony? It's been a while since I've actually read any, but the guy's fairly prolific and pretty solid, just. Themes and whatnot. Common trends. Put bluntly, dude's a freak of the sexual sort (at least in terms of authorial bent) and beyond that can get into some really rather
off stuff including but not limited to rape, incest (sometimes combined, those two), necrophilia, extreme social disparity, slavery, extreme gender issues, and... a bunch of other stuff. The list, it goes on. To kinda' put it into perspective, even his ostensibly young adult/children's series, Xanth, has at
least one sex scene, albeit one that's sorta' censored, ish.
But. At the time I read it (I was
much younger >_>), I enjoyed the Adept series (which is mixed fantasy/sci-fi), I've since found the Space Tyrant stuff (though it's sci-fi) surprisingly decent if you can get over/past some of the squiggly things (there's plenty!), liked the Battle Circle (post apoc!) and Incarnation series well enough (though, as I recall, some folks here have expressed issue with the latter, in particular. I take no offense from people taking issue with Anthony, haha.), and I think I got through the first two or three of the Mode series (this is one I'd say check the wikipedia page first, and beware
all sorts of triggers, up to and including suicide. It gets pretty damn freaky.), those last two both being sorts of fantasy, if not quite a traditionally epic sort. Xanth is... Xanth. It's actually a fairly interesting world, but, well. It's Anthony and it's "punny". There was a Xanth video game made! I wouldn't recommend playing it
Avoid Firefly. It has
nothing to do with the sci-fi series,
at all. It is the reason I was freaking terrified when I first heard about the sci-fi series. It is the book in which I learned what necrophilia was, when I was all of about eight. Just... don't touch. Trust the Frumple. Stay away. Y'all have been warned. Again.
Similarly, you'll...
probably want to avoid the Pornucopia stuff (dear gods, there was a sequel ;_;). It includes magical things like a person's reproductive organs getting stolen. It is
thoroughly explicit. The name should be sufficient warning. That said, it
does include one of the most amazing usages of accent/dialect I've ever actually seen put to writing, somewhere in the first half of the first book (iirc.). S'just... getting there. And then actually reading it, because it's mostly about smuggling demon eggs about in one's intestines. *coughs* I... didn't actually get
past that part.
Point being... approach Anthony's works with caution, but
maybe consider approaching. If you're under eighteen or so,
stay the hell away from all of it, would probably be my recommendation.
In any case, seconding Butcher's Codex stuff, since it only got a little note. Only thing I'd warn about is the bit of rape-related stuff part way through the series. Nothing directly happens, but it comes close kinda' repeatedly and it's pretty damn obvious the author was actually playing on that... cliffhanging and whatnot in the face of, which is kinda... yeah. That and it's definitely not a trilogy. There's six books in the series