Otomo's 1991 Roujin-Z was made available for viewing on YouTube this past year. It's 1h20m. Link: https://youtu.be/itg4zKaUMgY
There's also Otomo's 1995 Memories. It's great. I haven't found a good version of it on YouTube, but a quality stream of it is available on Amazon Prime.
Otomo also worked on Metropolis (2001) and Steamboy (2004). They're both great.
I wouldn't call it a great anime in general, but for our niche, it can be amusing.
I can't define it, but I feel like there is a link between the animators who worked on Ninja Scroll and the ones who worked on Puppet Princess (2000). Puppet Princess is short but looks like a lot of work went into it for it's time. If you want to see that, the only streaming service I could find with it was VUDU.
now i have a few favorites that i always rewatch: - hunter x hunter; the greed island arc was my favorite - the irregular at magic high school: magicians are ranked in the school by their compute power and speed, but the protagonist basically has orders of magnitude of more RAM than everybody else