Shoujo Kakumei Utena, Fate/stay night: Unlimited Blade Works Recommendations
both are mature stories taking place in and around high school, both feature teenagers struggling to fulfil their inherently flawed ideals, both main characters enter into a tournament where the grand prize is to grant miracles, sword fights are metaphors for idealogical clashes and finally I find Akio & Archer to be very similar characters.
Utena is kinda like female Shirou. Both is a lawful good hero who tried to save people, and both deconstructs heroic figure (hell, what happened to Utena in the end is practically the same as Archer's fate as a guardian and with his role and being tan himself, the Grail War Archer is kinda like Akio on some extent.) Both also has fights, one with good visuals while others with good musics as well as some SoL moments in the story.