There is no consensus on Android app stores. Despite its issues, F-Droid has some benefits and a few of the concerns with F-Droid can be alleviated by using the F-Droid Basic client and IzzyOnDroid repository. While Accrescent is well-liked, it is only in Alpha and not yet recommended for wide adoption by both PrivSec and Privacy Guides.
That said, the tier list you provided is what I assume most in the GrapheneOS community would prefer. Just note that AppVerifier is recommended in conjunction with Obtanium.
F-Droid Basic is recommended to install apps which are only available on F-Droid.
I’d stick to Privacy Guides’ recommendations for either Brave or Cromite which both support ad blocking out of the box. They’re considering adding IronFox, though this is a controversial decision.