One of the best is 'Conan the Barbarian'. It has all the classic elements of sword and sorcery. The art is great at depicting Conan's adventures in a brutal and magical world. Another good one is 'Elric of Melniboné'. It tells the story of a tragic anti - hero with a cursed sword, full of dark and moody atmospheres. And 'Fafhrd and the Gray Mouser' is also great. The duo's escapades in a fantasy realm filled with magic and danger are really engaging.
The 'Bone' series can be considered among the best. It combines sword and sorcery elements with a unique art style. It has a great story of three cousins in a strange land full of monsters and magic. 'Red Sonja' is also a classic in the sword and sorcery genre of graphic novels. Red Sonja is a powerful and fearless female warrior. Her adventures are full of action and magic. 'The Witcher' graphic novels are also good. They are based on the popular game and books, with Geralt's monster - hunting adventures being really exciting.
Well, 'Hellboy' has some sword and sorcery aspects. Hellboy's battles against all kinds of supernatural threats, often with a sword in hand, are thrilling. 'Spawn' also fits in to some extent. It has a lot of dark magic and the main character's journey is full of action. And don't forget 'Mouse Guard'. It's about the adventures of mouse warriors in a world full of predators and magic. The detailed art and the unique concept make it a great sword and sorcery graphic novel.