If you loved Neon Genesis Evangelion: Death and Rebirth, try Mobile Suit Gundam GQuuuuuuX -Beginning-
A bridge between a film you've already seen and one most people haven't. Mobile Suit Gundam GQuuuuuuX -Beginning- has roughly 23.6× fewer votes than Neon Genesis Evangelion: Death and Rebirth — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Neon Genesis Evangelion: Death and Rebirth

Mobile Suit Gundam GQuuuuuuX -Beginning-
What they share
Both films are directed by Kazuya Tsurumaki, and they both carry the cerebral, foreign gem, mindfuck mood tags, and they sit in Animation / Drama / Science Fiction territory. If that's the register that drew you to Neon Genesis Evangelion: Death and Rebirth, the second film will land in a comparable space — through a different lens.
What Mobile Suit Gundam GQuuuuuuX -Beginning- is
You live in a peaceful space colony, but when you meet a war refugee, your life is drawn into a high-stakes mobile suit dueling sport. The filmmakers balance action and drama in this sci-fi world.