You could take a look at one of the universal blue distros next time you want to try some linux https://universal-blue.org/
I use bazzite on my gaming pc and bluefin on my laptop. It is immutable linux, but the devs made the defaults really nice (for me at least)
I don’t use multiple users or ldap, but miniflux supports many users. And based on this pull request it seems to have the necessary interface for ldap?
https://github.com/miniflux/v2/pull/570
I enjoy and recommend miniflux for rss reading. I have used it for a long time now together with flux news android app. I also use save integration with wallabag sometimes.