There will be a (chamber) concert in the Elbphilharmonie (Recital Hall) on 9 October with a work of another unsung composer who is very much acclaimed in this forum: Ferdinand Thieriot. Soloists of the Hamburg Philharmonic Orchestra play his wind quintet a-minor op. 80. The rest of the programm is also not standard repertoire (besides Beethoven...).
For further information: https://www.elbphilharmonie.de/en/whats-on/philharmonic-chamber-music-recital/17945