Total Recommendations: 6
Believe it or not, Devil Survivor 2 and Digimon Tamers are probably the closest anime in terms of similar themes you'll find.
Both female characters pretty much have the ability of gods to manipulate the world to their liking and even unwilling-fully. However, in Sasami-san case, she is aware of her ability while Haruhi is not of hers.
You could say Joshi Kousei is what Seitokai Yakuindomo was before the school became gender co-ed.
The original base goal of the anime are both the same, to reach the top of the tower. However, SAO setting is a fantasy based virtual game, while Druaga is a fantasy setting based on a game.
Both series are based off of light novels. Though the main similarities is how they were adapted into their anime. Both barely bother to explain to you the minor details and you'll find yourself confused throughout both series unless you have prior knowledge of them from the light novels or any other source, although SAO does explain 'some' of its terminology. But regardless of understanding, both series are still enjoyable even with the lack of understanding. The overall genre of the two are fairly the same as well, as in action, adventure, fantasy, romance.
Both female mains are somewhat serious but have thier 'cute' moments.