Miniflux works great for me. Took a few months to get used to minimal layout, but it has everything that I need to read RSS feeds. I'm using paid hosted version, but there is an open source version which can be self-hosted.
Second this. I've been self-hosting Miniflux for years and love it. It's dead simple to run (a single executable daemon or docker container that you can run behind a reverse proxy) and it sounds like exactly what the author of this article is looking for--no frills RSS reader with a very minimalist interface.