Some of the best comics graphic novels include 'Watchmen' by Alan Moore. It's a masterpiece that deconstructs the superhero genre and explores complex themes like power, morality, and the human condition. The characters are multi - dimensional and the art is top - notch.
Maus by Art Spiegelman is also among the best. It tells the story of the Holocaust in a unique way, using animals to represent different groups. It's a deeply moving and important work that uses the graphic novel format to great effect.