Yojo Senki: Saga of Tanya the Evil

This is one of the few cases where an anime adaptation surpasses the manga. The manga is a mess of aesthetics, mostly from the 40es in an alternative 1920es setting. The anime is much more coherent.

The main character is actually interesting in his thoughts and actions and the whole story is about a challenge to God where every success of the MC either brings greater challenges or forces God to intervene to up the game.

Worthy of note is also the expressivity of the MC, wether it is coherent with his feelings or he's putting on a face to achieve his goals.