Vagabond, Blood and Steel Recommendations
They both have outstanding art and realism as well as outstanding battle scenes. Vagabond has fewer characters, more of a seinen. BaS has more fight scenes, characters and styles introduced.
People who are striving to become the strongest in their martial arts / swordsmanship. Both have among the best art seen in any manga and both are set in historical time periods. While Vagabond is a manga, Blood and Steel is a manhua.