Fusion is quite interesting. I forked miniflux into https://github.com/rcarmo/picoflux because I wanted something lighter, but I like Fusion's screenshots better than the mini/picoflux web UI, so I will be looking at that ASAP.

Another small standalone single-binary rss reader is https://nkanaev.github.io/yarr/en/

It also supports fever api so you can use all kinds of mobile clients. The binary is smaller, and I prefer three column layout for reading on web.