So, if you can swallow the incessant fan-service in it, High School of the Dead. The director who handled Attack on Titan directed it. Essentially hits what you're looking for in a show. But again, let me stress, you must have a high tolerance for fan-service, and for the love of god, don't watch it with any non-anime folks.
Edit: Also it's incomplete, and I expect it will remain incomplete as the manga creator recently passed away.
Edit: Also it's incomplete, and I expect it will remain incomplete as the manga creator recently passed away.