Created an account to share this, as it seems not many people know...
You can use an AOSP such as lineage, or carbon. There are quite a few options.
Then, use fdroid and a play store alternative. You DO NOT need the google play services, such as microgapps, or opengapps. Even to use Google Maps! I use google maps by downloading maps anonymously with the Yalp store, and then I don't sign in. I don't have the so called high accuracy location, but I still have GPS, which, obviously, is sufficient. I can navigate easily in a large city, for example.
As far as I know google can't link me to any data that maps sends.
Spotify works fine, along with a half dozen other apps.
Signal can a bit of a pain, as it complains about not having a google api backend, which I think is for contacts. Again, the pain is worth it. And there are open source contact alternatives.
I can't get apps that I paid for, for that I would have to sign in with Yalp, which I haven't bothered with. The freedom is so much better.
Everything else works, banking apps, Firefox, Dropbox, etc.
I'm using a Sony Xperia Z2. The battery is AMAZING! I really wish a largish company would pick this idea up, and start selling phones without google. Sony? The freedom and privacy is worth a lot in my opinion.