Neris, by Eimantas Paskonis.
Demos Next Heavy, by Gerard Unger, is a free representative of the large Demos Next family. It handles Hanyu Pinyin with tone marks nicely.
Today’s Pinyin-friendly font is Sorority, by Kreative Korporation. It’s free for personal use.
Today’s Pinyin-friendly font is Skarpa, by Aga Silva of Poland. It’s a bit quirky (e.g., second-tone o’s and lowercase q’s) but still sharp.
Skarpa was later modified into Skarpa 2, which is not free but which comes in several weights and types.
Most of Silva’s other fonts also can handle Pinyin with tone marks. Those are all commercial rather than free.
Sherbrooke is a free Pinyin-friendly font by Eyad Al-Samman.
Balint Erdosi (I’m sorry to omit the diacritics for now) of Hungary created both of these, which are available as donationware.
Today’s Pinyin-friendly font is another display face: Arca Dashed, by Ricardo Marcin and Erica Jung. It has a papercut style.