For my next phone it will be between a used Pixel with Graphene OS and the Fairphone 6 with the de-Googled e/OS option. A modern Pixel would be a little better for CPU, camera and RAM, but the Fairphone has decent hardware specs and tries to be more ethical about the environment and its suppliers, and it has a replaceable battery. The Fairphone is expensive in the USA though.
https://shop.fairphone.com/the-fairphone-gen-6-e-operating-system
https://www.wired.com/review/fairphone-gen-6/
Edit: After reading this thread I would lean towards Graphene OS: