Top 10 in Top 10 best fantasy anime similar to Attack On Titan you can't ignore.
Goblin Slayer Fiction Anime Trailer
Goblin Slayer is the best dark fiction anime similar to Attack On Titan, it released in 2018 with 12 episodes. The story is about an inexperienced adventurer who is also a priestess. She joins a group of other adventurers to do a contract job. However, things go awry when every member is killed except for her. She miraculously survived because she was rescued by a mysterious man named "Goblin Slayer". He is also an adventurer looking to kill goblins. Goblin Slayer is really a dark fantasy anime that you should check out.