If you want pure android, then a Pixel phone, but if you want to degoogle, no…
why? other than "your'e giving money to google just before removing google"
Know that when you unlock bootloader/replace ROM, you will most likely lose the ability to pay with your phone, or play a cat and mouse game with magisk and addon and google Wallet.
I didn't know about this, custom ROMs cannot run these kind of services?