Top 6 in Top 10 best fantasy anime similar to Attack On Titan you can't ignore.
Fiction anime trailer Castlevania
Castlevania is the best fantasy anime similar to Attack On Titan, it is one of the "shining jewels" of Netflix. Although based on the popular video game series, you don't have to play to understand this fantasy anime. However, learning more about the game is also not a bad idea.
Like some other suggestions on the list, Castlevania also has the appearance of many dark monsters and vampires. Along with the great action scenes mixed with humor, tragedy, and the characters are described quite well, all become plus points to help the anime make a mark in the hearts of fans.