Great list. There's also the option of going for a SailfishOS smartphone because you won't have to abide to FAANG tracking.

Fairphone 3 doesn't quite fit the bill, but I'd still mention it in lists like these as it is possible to unlock bootloader, the phone is modular so can be repaired, and the Fairphone 2 ran a myriad of OSes (#3 just got released, give it some time).