Considering how many people have issues finding which fonts work, I decided to compile a big(ish) list of fonts that work on Discourse! These were tested to work on Windows, not sure how they'll all do on mobile/Mac. (EDIT: sadly, not well at all) If there are others that work, feel free to comment them below! After about 10 minutes, I'll give this post a quick edit so the font CSS can be copied.
ms sans serif
hololens mdl2 assets- formatting different but similar to Times NR
goudy old style
big macho military font
haha funny meme font
Papyrus (please don’t use this)