I would suggest doing a tour of all of Miyazaki's films. I find that all of his movies have a similar vibe that can't be parallel even by other Anime.
Sherlock Hound (1984)
First 6 episodes were directed by Miyazaki, he had to quit in order to work on Nausicaa. It’s much more light hearted.
You remember the scene "The seven days of fire" ? it’s was realized by Hideaki Hanno, who later on directed Neon Genesis Evangelion.
I’d recommend Berserk. The atmosphere isn’t exactly the same tho.
Tenkuu no Shiro Laputa.
Ima, Soko ni Iru Boku.
If you liked the ecological themes you might like Gon, which is a superb drawn story of a little dinosaur engaging with other animal forms. If you want a graphic novel there's Puma Blues which is a beatiful story as well.