CalyxOS de-googled phones feature a great balance of privacy, security, and compatibility. Probably the best privacy option for the average user because of its privacy-based compatibility with Google apps, and the bundled app stores F-Droid and Aurora Store.
This is the most secure and private mobile operating system available right now. Graphene took the base Android Open Source Project, and prioritised security and privacy above all else. If you’ve used Android before, you will be comfortable using Graphene OS.