My favorite is Galaxy Express 999. It's got space pirates, a mechanized empire, an intergalactic journey about love, revenge, humanity, and dreams. It's from '79 so the designs are decidedly retro and it's not as shiny and slick as newer productions but I think that just gives it more character. Also has one of my favoritest endings, it sticks with me every time I watch it.
Highlander: The Search for Vengeance is one of my favs
Hell yeah. I'd put that as the best Highlander movie after the first one. I know that's not a high bar, but still. I just wish the villain hadn't worn suspenders for the final fight. No one's threatening in suspenders.
Nausicaa of the Valley of the Wind
My favorite Miyazaki film. It's hard to go wrong with airships, 80's synth, and Patrick Stewart & Mark Hamill.
Street Fighter: The Movie
I legitimately adore the live action one, but it's still nice to have a decent serious one. I'd actually say this is one of the better video game adaptations in general, not just anime. Another low bar, I know.
Blade of the Phantom Master
So underrated, it's too bad there weren't more or a series because Munsu is such a delightful bastard of an anti-hero.
Taro the Dragon Boy
A childhood favorite. Another one from the '70s but I love the focus on Japanese mythology and the visual style that's similar to classic water paintings.