Buy a second hand pixel 8, 9, 10 pro, xl or not, based on your budget. I wouldn't recommend older. Then after loading GrapheneOS create a couple user profiles. While in this screen remove the ability of the profile to run in background. Use one of these sandboxed users as a Google phone. Install Google Play Compatibility through the graphene installer. Now you have a Google option. Some banking apps won't work, and the McDonalds app won't work. Google is then sandboxed and not running constantly. If you need a Google app, you can switch over. And without background profile running enabled Google services will completely closed when switching back. No reset needed, just like 3 seconds loading. If you install Wattz (fdroid) you can see the power draw reduced in nongoogle mode. The root profile can share apps, create and delete profiles. I guess one downside is you need to learn multiple login passwords. Also no tap to pay ever.