iodeOS, calyxOS, /e/OS are all good projects. divestOS are also good, but probably not usable for most, because of the lack of google play alternative. it now works with unprivileged microg. However use of microg is still is unsupported and unrecommended according to the website.

paranoid android seems to still be a thing. The introduction on the website is sparse, and I havent tried it. So I cannot speak for how good it is.