If you liked
Seijo no Maryoku wa Bannou desu
|
...then you might like
Madougushi Dahliya wa Utsumukanai
|
Both have similar atmospheres of cozy fantasy. They both feature reincarnated isekai lead women who use their second life to become passionate experts in a new magical field of their choosing, both worlds are pretty peaceful but have a dedicated army to fend off monster attacks, both feature MLs in said army that also happen to be aristocrats, both women become influential in their fields and entangled with the upper class/royalty in some way. If you enjoy one, you'll probably enjoy the other as they share a lot of similar DNA while being different enough from each other to not feel derivative.
If you liked
Deadman Wonderland
|
...then you might like
Shingeki no Kyojin
|
Both have a similar feel to them, and ask many of the same questions surrounding loss, morality, survival of the fittest and the human condition. They even have relationship parallels in the forms of 'willing to do anything to protect a loved one, despite what/who they are', and mysterious experiments, etc. They'll both linger with you long after you've finished watching/reading them and keep you thinking. Definitely highly recommend both for anyone who's tired of the same hero vs villain stories and want something with a bit more depth.