Liberation fonts, Noto fonts, Deja Vu fonts and Nimbus fonts pretty much. Add in Cantarell too and you are set I would say. Those are the ones you should install for compatibility.
I always install Inter for UI and JetBrains Mono for terminal usage. I find they render way better than pretty much anything else.
Update: Discovered Geist and Geist Mono and they are amazing, I am going to replace Inter and JetBrains Mono from now on: github.com/vercel/geist-font
I use Thunder and previously I used Voyager. Both are amazing open source clients for Lemmy!