What Anime series did you watch after finishing AoT?

Aside from the anime that aired on American TV growing up, I never really sat down and watched an entire series until now! I just started Part 2 of the final season of AoT, and I love it so much that I do not want it to end!!! But now I am worried I started with such a highly rated show. What anime should I watch next that can match this level of storytelling?

What drew me to Attack on Titan was its themes of oppression, politics, and how they reflect the real world today. I would love something with a similar depth. Any recommendations?