Mass effect for video games, Rebuild of Evangelion for movies, and Old Man war for Books. I know only mass effect is a trilogy (Andromeda doesn't exist) but I feel like all three stayed with me after finishing them, and the character development and plot lines all had satisfying conclusions.
There's not much else to see. Honestly the best ending is the little citadel get together you play sometime in 3. Most of the characters you've come to know and love all gathered for a small, low key house party. Everything about the battle for earth and the citadel ghost can eat my shorts.