The Brazilian composer Heitor Villa-Lobos wrote for some unusual chamber ensembles. For example, in the Choros series we have:
No. 3 for clarinet, bassoon, saxophone, 3 horns and trombone.
No. 4 for 3 horns and trombone
No. 7 for flute, oboe, clarinet, saxophone, bassoon, violin, cello and an offstage tam-tam
Sexteto mistico, for flute, oboe, saxophone, harp, celesta and guitar