Top 3 in Top 10 best fantasy anime similar to Attack On Titan you can't ignore.
Synthesize the soundtrack from the second part of the Tokyo Ghoul fiction anime series
Like Eren, the protagonist in Tokyo Ghoul is a hybrid between a monster and a human. Ghouls are not like Titans, they have human form but must survive by eating humans. They also possess a lot of supernatural powers, can sometimes go crazy if they are too hungry or too excited. The main character, Kaneki, becomes a half-vampire due to an organ transplant surgery from a donor vampire to his body. The story revolves around Kaneki having to learn to live with his new body. Tokyo Ghoul is really the best fantasy anime series similar to Attack On Titan that you should watch.
Most likely people know this anime, it is so popular that it has been adapted into live-action and video games.