Either Orchestra

The Either/Orchestra (E/O) is a jazz group formed by Russ Gershon in Cambridge, Massachusetts, USA, in 1985. E/O is configured as a "small big band", with three saxes, two trumpets and one or two trombones. E/O's is characterized by a heavier and more orchestrated sound than that of a smaller jazz combo, but remains more streamlined and Improv-oriented than most Big Band-s... Drawing on leader Gershon's experience on the Boston rock scene coupled with the diverse musical backgrounds of its members, the outlines of the Either/Orchestra were influenced by Duke Ellington, Gil Evans, Charles Mingus and Sun Ra. http://en.wikipedia.org/wiki/Either/Orchestra

Lots of Ethiopian collaborations (World Music).

Their last official album was 2010! (Mood Music for Time Travelers) They were working on a couple new albums in 2017, but they haven't appeared.

Russ Gershon founded Accurate Records, which has released albums by Morphine, Medeski Martin & Wood, the Alloy Orchestra, Ghost Train Orchestra, the Either/Orchestra, Dominique Eade, and Garrison Fewell. He has been a member of rock bands the Decoders (1980–82), the Sex Execs (1982–84), Hypnosonics (1986–1999), Orchestra Morphine (2000–present) Bourbon Princess (2003–2008). He has worked as a studio musician and has performed in Boston. https://en.wikipedia.org/wiki/Russ_Gershon