I have multiple Pixel 7 phones GrapheneOS in my family with close to zero issues. It's a good choice for GrapheneOS IMO, except that support ends in Oct 2027. The Pixel 8 is still great also but has a more fragile screen.
I haven't used any newer devices with it yet.
Sounds good, thank you. The Pixel 8 is way outside my budget, it’ll mostly be a testing device for my mobile apps (gotta make them work on GOS).