If you only take away one recommendation:
Its neutral design recedes into the background, letting content shine. MustardMan42/Custom-CSS-for-Foundry-VTT - GitHub
Does it have a full family? A good OT font family should offer a wide range of weights—from Hairline and Thin to Black and Ultra—allowing you to build visual hierarchies easily.
Includes specially designed small capital letters that match the weight of lowercase text. Comprehensive Glyph Sets
Good.
If you only take away one recommendation:
Its neutral design recedes into the background, letting content shine. MustardMan42/Custom-CSS-for-Foundry-VTT - GitHub
Does it have a full family? A good OT font family should offer a wide range of weights—from Hairline and Thin to Black and Ultra—allowing you to build visual hierarchies easily.
Includes specially designed small capital letters that match the weight of lowercase text. Comprehensive Glyph Sets
Good.