One such manga could be 'Vagabond', which also features intense battle scenes and complex character development like in Kingdom.
I'd recommend 'Berserk'. It has a gritty and dark war-themed setting similar to Kingdom, with deep storylines and powerful imagery. However, it's a bit more mature and intense in its themes.
Chapter 343, "He Can Support Jiang Li for a Lifetime", is the clearest early answer because it turns Hua Country's situation into a concrete plot event.
Chapter 321, ""Great Benefactor" is Jiang Li?!", is the clearest early answer because it turns Mrs's situation into a concrete plot event. It opens with Several people thus settled down in the living room, and the servants...
Chapter 433, "The Young Master Has His Own Ideas", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 361, "Kids Make Choices, Adults Want It All!", is the clearest early answer because it turns Liu Suqing's situation into a concrete plot event. The chapter gives readers a real answer by opening on Everyone knows that Suqing's forte is Double-sided Embroidery," Miss...
Chapter 391, "Has another top celebrity had a scandal?", is the clearest early answer because it turns Shining Transformation Trip's situation into a concrete plot event. Early on, You were born in a rural area, not exactly poor, but not particularly....
Chapter 749, "What if He Made a Fatal Mistake?", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event. A useful checkpoint is the way the scene starts with I saw the trending topics." Jiang Li left Weibo and initiated a voice...
Chapter 250, "This Jiang Li is Definitely Doing it On Purpose!!!", is the clearest early answer because it turns Wen's situation into a concrete plot event. The chapter turns that into something concrete by moving from The knowledge that several guests were soon returning had fans...
Chapter 574, "They Are Ill-fated", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. The chapter gives readers a real answer by opening on Sister Li really gave it to her!" "No wonder she's my Sister Li,...
Chapter 490, "Closing the Door to Let Pigs Loose", is the clearest early answer because it turns Nina's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li sat down in front of Guan Xiong with an unperturbed...
Chapter 412, "Successfully Landing on the Island", is the clearest early answer because it turns Don's situation into a concrete plot event. The chapter gives readers a real answer by opening on After everyone was fully dressed, several teams began to disembark...