GrapheneOS
https://grapheneos.org/
I used to use copperhead os on my nexus 6p, so grateful to Daniel Micay for his work. Now running grapheneOS on my pixel 2. Up until now was running it stock with no google account signed in getting apps from f-droid and using yalp store to scrape apks for needed apps. So far so good. Perfectly stable. Also found an alternative to yalp store called Aurora Store. If you have a supported phone or are able to contribute check it out.
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