[odsum25]

Chester Biscardi has a work for solo soprano called "No Feeling is the Same as Before": https://chesterbiscardi.com/product/no-feeling-is-the-same-as-before/

Gareth Farr has a piece (actually a transcription of a viola piece) called Meditation: https://edition-peters.com/product/meditation/prepe125 He's also written a few sax quartet pieces.

Michael Finnissy has some mixed ensemble works featuring saxophones. There's also a Cowell work, Air and Scherzo. Lou Harrison wrote "A Cornish Lancaran" for American gamelan and soprano. I think that Nico Muhly has some mixed ensemble works for saxophone as well. Jennifer Higdon has a quartet, concerto, and sonata.

If serialism is more your thing, Wuorinen has a few works:

• Concerto for Sax Quartet and Orchestra - https://edition-peters.com/product/concerto-for-saxophone-quartet-and-orchestra/ep67548
• Divertimento for Alto and Piano - https://edition-peters.com/product/divertimento-for-alto-saxophone-and-piano/ep66929
• Saxophone Quartet - https://edition-peters.com/product/divertimento-for-alto-saxophone-and-piano/ep66929

 

[odsum25]

John Cage's Four5 and Five4 are options as well.

https://johncage.org/pp/John-Cage-Work-Detail.cfm?work_ID=88

https://johncage.org/pp/John-Cage-Work-Detail.cfm?work_ID=76

Of course, you could also do any of his works for unspecified instrumentation. I knos that Ryoanji has been recorded on saxophone.