In addition the to broader and more mature genre of "rationalist fiction" overall, definitely check out some of the specific EA-themed creative writing contests that have happened:

• The short story contest that took place last year on this very Forum: https://forum.effectivealtruism.org/posts/gySGqztQvaEScokwL/creative-writing-contest-the-winning-entries

• The Future of Life Institute's AI-themed sci-fi worldbuilding contest which just concluded: https://forum.effectivealtruism.org/posts/HEszzR4Am7PxN3hBG/here-are-the-finalists-from-fli-s-usd100k-worldbuilding

r/rational put together a spreadsheet of a bunch of rationalist fiction. You should find much EA related material here https://docs.google.com/spreadsheets/d/1OEoxYzFeF0UpJmHY5pqHP_Yam-cw9kXDyXZbH6ANJiM/htmlview

Alexanderwales appears on a few of those lists and posts but he fairly recently did a much more directly EA-focused take on Superman which I highly recommend:

https://archiveofourown.org/works/30351690

I wrote this novel as a way to explore how a Xianxia society would combat the existential risk of a threat that could not be defeated in combat. I also wrote an after action review of how it was to write an entire novel explicitly from an EA lens (see my post). The MC is an EA-Rationalist, and... it did a lot better than anything else I have ever written...

https://www.royalroad.com/fiction/49962/sect-leader-cold-hard-truth-isekai-cultivation

I wrote a couple short posts along these lines recently, if it helps:

https://forum.effectivealtruism.org/posts/fvqRCuLm4GkdwDgFd/art-recommendation-childlike-faith-in-childhood-s-end

https://forum.effectivealtruism.org/posts/y8MT2WfdD6oK8MwBz/art-recommendation-dr-stone