Shigurui, lit. Death Frenzy. A manga set during the early Tokugawa shogunate about the rivalvry of two prodigious samurai. One seeks to advance on the societal and class ladder in a time when it was extremely difficult to do so, the other wants to sit comfortably and fulfil his role, that he thinks he was destined for. It has pretty good characterisation. By the end of the manga I can't say I hated or even strongly disliked the antagonist, regardless of his actions, he kills his own mother, for instance. He is sort of endearing in a way. It was a nice twist, perhaps because it felt natural, that our main guy ultimately defeated him through deceit. Immediately after, however, came his downfall as a person. Although it has good art and good pacing, If you're not invested in their struggle, you'd not enjoy it, probably.
Baki parts 1 through 3 tell an almost epic struggle of a son who wants to achieve strength in order to fight his father. A spiritual battle as much as a physical one, he must find a way to overcome his immense presence in his life, ironically even when he's not around his son for years. Every time the father, Yujiro shows up, you know something's going to happen. The main character, Baki, is an interesting guy, he's not quite what you'd expect from a shonen protagonist. There's almost a deconstructive element to him. When I was younger I was very emotional when Baki broke down mentally when he was defeated in the first battle with Yujiro, which resulted in the death of his mother who was very abusive and manipulative towards him. Still, she was his mom and she gave her life in exchange of his own. It was pretty f-ed up and the cast acts accordingly.
It has plenty of side characters who are pretty cool. There's a lot of cool events, a favourite moment was probably when Orochi Katsumi sacrifices his arm by using the power of imagination, so that he could defeat the pre-historic caveman Pickle who lived during the Jurrasic era. The art can be considered a mixed bag. While the characters themselves range from alright to pretty cool, the mangaka cheats for the surroundings quite frequently, especially with crowds. He tends to copy and paste the same five guys too much. The fighting is your rather standard progression system for a shonen and it also follows a tournament style, but it has twists, especially part 2. In part 3 though, the last battle is particularly insane with the level of detail Keisuke Itagaki put into the action set pieces, which is fitting. Charcoal was put into very good use on the skin of Yujiro especially.
There are probably others, but that's all for now.