I dunno, switching from a phone with a pre-installed Google maintained OS to a custom rom of a Google maintained OS isn't exactally fully cutting Google out.

AOSP and its derivatives may be maintained by Google but they don't call home without the proprietary Google apps. Just leave those off and use something like F-Droid to get apps and you're Google-free. None of the Android devices I use (phones and tablets) has any Google-proprietary code installed, all of them work fine without such.

Lineage is Android sans Google. It's exactly what you want if you want to cut Google out.