For me it would be:

Linux phone (no viable model exists yet) > GrapheneOS > LineageOS or similar de-googled ROM > iPhone > Vanilla Android with Google crap > Android with Google crap and manufacturer’s bloatware

I don't think I'd trust that, and it would be pretty embarrassing not to do it yourself! I ran across a guy on youtube who was thinking of selling pre loaded graphene pixel 7s. 

Check out graphene OS on eBay, there are some people selling the service of loading graphene OS on your phone.

slyv

I don't know enough to answer the question. There are people here who can give an informed answer.