gReader Premium. It is no longer available on the Google Play store, but you can still find it on alternative sites like Aptoid and such, I think.

I've tried LOTS of them. This one is the best, in my opinion. Works with Feedly and other online services, as well as stand alone subscriptions.

Here is the URL to the Play Store as it still shows up for me, but might not for you.

https://play.google.com/store/apps/details?id=com.noinnion.android.greader.reader

I used to use MJ PDF, but recently switched to the built-in PDF reader for FOSS MiX file explorer.

I read your whole post to the end. I'm nobody, but my vote is to not defederate. I want to be exposed to all sorts of viewpoints, even if they are offensive. Being inclusive means nothing if you only include those you like.

I want to hear all viewpoints. Don't talk for me. You can block if you're against diversity, equity, and inclusion.