If you loved Legend of the Galactic Heroes: Golden Wings, try Dragon Ball Z: The History of Trunks
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Legend of the Galactic Heroes: Golden Wings
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Dragon Ball Z: The History of Trunks
What they share
Both films are directed by Yoshihiro Ueda, and they both carry the foreign gem mood tag, and they sit in Action / Animation / Science Fiction territory. If that's the register that drew you to Legend of the Galactic Heroes: Golden Wings, the second film will land in a comparable space — through a different lens.
foreign gem
What Dragon Ball Z: The History of Trunks is
You fight for survival in a post-apocalyptic world, but a young warrior's fate may change everything. The director's vision leaves you with a haunting possible future.