Well, at least you have good taste. The one you mentioned is one of the most recommended to me. I also love science fiction anime for the same reason, since many have amazing stories.
Among my favorites is Pluto, a science fiction masterpiece that you must see.
Oh yeah we watched Pluto, it was great, and if im not wrong it was the same writter as Monster?
A smart scifi, with lots of mind-bending scenarios is my jam.
I also like iseaki fantasy, but only if it's original.
Actually my go-to lately has been Webtoon.
I'm not sure, but it's from the same creator as Astro Boy, it's from the same universe, apparently.
I also watch Isekai anime. But nothing compares to Re:Zero, a masterpiece.
Unfortunately, I don't read manga or webtoons.
Re:zero has some amazing animation, but i lost the plot at some point... i need to revisit it some time.
I stumled on a cool webtoon by chance and I've been a reader since... Manga not so much cause i like color and well rendered scenes...
I've watched Re:Zero about five times already and I never get tired of it. It's just too good, especially the first two seasons.
I'm more into watching anime; I almost never read manga or anything like that.