Windaria

Although they have completely different premises, Akame ga Kill and Windaria share a few elements, such as: -Medieval setting. -Two armies fighting each other, from the same kingdom in Akame ga Kill and from two different ones in Windaria. -Lots of death and gore. -Tragic romances between enemies. -Rather tragic endings. But I'd say that Windaria is better because, unlike Akame ga Kill, it does not suffer of mood whiplash, it remains a serious and tragic war drama from beginning to end and never throws in off-putting comedy in the middle of its tragic moments like the other anime.  

Both have two sides at war and in the middle of the war the love of two characters who must face each other despite the fact that loving each other gets in the way 

These two movies are heavily allegorical fairy tales that focus on a loss of innocence leading into inevitable tragedy. 

simple characters w/the real human flaws. simple but powerful messages of how easy it is for humans to get caught up into problems they create & then destroy all the natural beauty around them.... 

Windaria did the "Happy Fairy Tales Gone Wrong" theme 25+ years ago.