Have you ever read Berserk? (Read, not watched)
There is also a manga called Vagabond that's ridiculously good but was sadly dropped (eternal hiatus).
Berserk is a medieval fantasy while Vagabond is a fantasy about one of japan most famous samurai ever.
If you want a bit less serious (still serious tho) you can also go for Kingdom, a manga about the unification of China during the warring states era.
You have a very good bunch of mangas to try now, you're welcome.
I'll try beserk. I lost myself while watching Parasyte just before GoT came on and that has probably fucked everything because of the stupid drama..
Doesn't matter, I'll watch beserk. Hopefully. Thanks man.
Do not watch it, read it.
Or else don't even bother, the anime is pretty bad.
The manga is the pinnacle of manga art.