Which popular anime series has been adapted into successful comic book series, and what are the key adaptations?

Attack on Titan is a prime example of an anime series successfully adapted into a comic book. The comic adaptations often provide expanded storylines, explore perspectives not fully covered in the anime, and offer additional backstory. They frequently delve deeper into the political and historical context of the world, offering a richer understanding of the characters and their motivations. There are several different comic series based on Attack on Titan, spanning various timelines and character focuses.