Consider this (by Graphene OS): https://discuss.grapheneos.org/d/24134-devices-lacking-stand...
/e/OS community talking about it: https://community.e.foundation/t/article-from-grapheneos-abo...
And then maybe this: https://eylenburg.github.io/android_comparison.htm
Hope that helps.
I like GrapheneOS but they fail to understand in this post that the #1 security concern an android user face is the lack of privacy.
Sure they have hardened everything but realistically, that's not the main threat for your average user.
Their top contribution to android is the sandboxed Google Play, by far.