You mean, you dont like Ghibli? Dont ask me, that mindset is totally alien to me. Only Yesterday, Grave of the Fireflies and Whisper of the Heart have no fantasy aspects.
What about something psychedelic like Kaiba or Mononoke (MJF probably always recommends this one to everyone, not the one about the Princess, although that one's better)?
Maybe you should try Legend of the Galactic Heroes (probably the best space opera, but not exactly mindblowing). And it's quite long, the whole thing.
EVERYONE loves Satoshi Kon! https://www.icheckmovies.com/movies/?ta ... oshi%2Bkon
Barefoot Gen is safe, bout da bomb.
The Ghost in the Shell movies and series? Hardcore! The robots are silly tho.
Monster (2004) is serious, but there's some fantasy tilt.
The Rose of Versailles? Kinda serious.
The original Lupin III? For silly episodic fun, still about the best.
Cowboy Bebop is cool.
Tatami Galaxy is a must, but it's fantasy too I guess?
Anyhow, my favorite long anime series is still Anne of Green Gables.
currently working thru such film lists (besides TV): 2010s bests, RW Fassbinder, Pier Paolo Pasolini, Luis Bunuel, Yasujiro Ozu, Eric Rohmer, Visual Effects nominees, kid-related stuff, great animes (mini-serie or feature), very 80s movies, 17+ sci-fi lists on watchlist, ENVIRO, remarkable Silent Films and Pre-Code (exploring 1925 atm) and every shorts and docu list I'm aware of and
and "Gordon" Liu Chia-Hui/Liu Chia-Liang and Yuen Woo-ping and "Sammo" Hung Kam-bo