There are so many out there, a few that I came across include:
- Wallabag ( GitHub, Website): Older, long history, somewhat clunky now?
 - LinkWarden (Website): Focus on multi user and teams?
 - Raindrop.io (Website)
 - Omnivore (Website)
 - Hoarder (GitHub)
 - Shiori (Article)
 - Readeck (Website)
 
Having a giant comparison table for this might be nice


That’s a nice workflow :) except for KOReader, I do the same combo Miniflux + wallabage + linkding.
Wallabag + miniflux for articles to read and Linkding for important stuff (mostly github stuff).
What’s cool about that workflow it can be automatically send through each other with their API.
I also installed Newsboat as an alternative to the web interface https://newsboat.org/releases/2.35/docs/newsboat.html#_miniflux