Not sure what you're asking for manga wise, but here are a few you can look into which I have enjoyed (though probably not finished reading yet):

Vinland Saga
Akumetsu
Ares
Sengoku Youko
Lucifer and the Biscuit Hammer
3x3 Eyes
Anything from Naoki Urasawa (Pluto, Monster, 20th Century Boys, Happy!)
Blade of the Immortal
Vagabond (seems to be on a long hiatus though)
Eden - It's an Endless World!
Psyren
The Ravages of Time