chord symbols using "Jazz" font set
Of the various handwritten music fonts that I've tried, my favorite is still the "Jazz" font that has shipped with Finale for a long time. The font itself is proprietary and there is probably next to zero chance of it getting bundled with MuseScore. But for those who already have and like this font set - and in particular for chords - I am posting a set of customized XML files that are tweaked work with the JazzCord font.
I use a modified version of the Brandt & Roemer system, with "ma" / "mi" / "o" for major / minor / diminished, and no parentheses on extensions or alterations. But I've tried to make it easy for one to customize things further by taking a cue from franck102's clever system in this thread:
By editing the entries at the top of the two XML files, you can get it to recognize and produce any other system you prefer. I didn't do as thorough job of setting this up, but with a little poking around you should be able to do what you want. Note that chords.xml controls how MuseScore recognizes chords that you type; jazzchords.xml controls how MuseScore displays the chords it recognizes.
To use the XML files, install them in your MuseScore/styles folder (replacing the existing chords.xml), then set your Text Style / Chordname / Font to JazzCord (I use 12 point) and your General Style / Chordnames / Chord description file to jazzchords_jazz.xml. Then type in your chords. The results aren't perfect, but I do like this font better than the other options I've tried. I like how horizontally compact chord symbols end up being for a given vertical height, and I like the relative sizes of the various elements. I've also attached a sample tune using these chords.