I've looked into most of these (and instapaper, pocket, etc) and ultimately found Wallabag to be the best. However, their app is quite buggy and site is fairly clunky for my taste. Luckily there's a pretty recent 3rd party client that works offline super well and is on Mac/Linux/android/iOS for free (yay flutter) https://github.com/casimir/frigoligo
Also, I'll note that it's basically a must to use the browser extension with the option to download via what the browser sees if you get content from a lot of sites. That being said the devs are super responsive to reports that sites aren't being scraped appropriately.
My biggest wish is that they supported YouTube (at least titles) and they had a way to indicate when a article needs to be scraped client side.