[busyant]

This one is quite well-known already, but I think Univers is beautiful: https://en.wikipedia.org/wiki/Univers

Apparently, Frutiger said that "Helvetica is the jeans, and Univers the dinner jacket." I think that's appropriate.

I'm also fond of FF Scala and FF Scala Sans: https://en.wikipedia.org/wiki/FF_Scala

https://en.wikipedia.org/wiki/FF_Scala_Sans

Sadly, these are not open source. But they all have a relatively large number of glyphs.

If you want something open-source and with a ̶H̶U̶U̶U̶G̶E̶ largish number of glyphs, here is Junicode: https://github.com/psb1558/Junicode-New