Top notch article thanks for posting. Thanks for pointing out those fonts, I feel like finding good fonts is always a struggle for me. Anyone have any other suggestions like these?
One way is getting a typekit subscription and checking out their font lists [1]. Aside from providing many excellent fonts, there are good descriptions of mood properties and historical context that can really help to choose something appropriate.
Source Sans Pro is Adobe's first open source typeface and was designed by Paul D Hunt. It was specifically designed for user interfaces, and is available in multiple weights. I think the regular weight also works well for body text.
Whenever I find a font on a page that looks interesting, I highlight it and go to Chrome's Inspect element Computed tab to get the font name. As the blog says, steal like an artist.
1 - https://typekit.com/lists