Shoujo Kakumei Utena, Shinsekai yori Recommendations
1-Both are full of messages, multi-layer concepts and social critic
2-Both talk about adolescence, madurity and sexuality in actually original way
3-One view is not enough to understand the whole
4-Action and drama without topics or cheap fanservice
Utena is more complex and deep, but both are much enjoyable if you wish an intelligent anime.
Shinsekai Yori and Utena are two sets full of social criticism in another context, profound messages, addressing issues such as homosexuality or social convictions of an original and effective way. Both deal close but very different issues and contexts, and both series are that if you see more than once will get much more out them out. Also try both tackles the issue of maturity in adolescence.