What has more complex animation than Akira?

This is often held as the high water mark. I know some people disagree. What has "better" animation as best can be determined?

Ghibli's stuff in my mind is held as the best for many people, but I think Akira is technically better both in frame rate and just literal detail in the world. There's some stuff like 5 cm/s and Children Who Chase Lost Voices, which both look great, but again as far as just fluid movement and complexity I think Akira is more detailed. There's also other high quality animation like Ghost in the Shell 1 + 2, Summer Wars, Paprika etc. but none of it is quite on the level of Akira. There's either extensive CGI work which is a bit different, or the animation has more dead points where it goes completely still, even if the CGI behind it is always moving.

The closest I can think of is actually 2006's Tekkonkinkreet. Very detailed animation, and a very unique and varied look as well.