Here’s another composer who has been almost forgotten and whose music is rarely performed these days; and yet ‘back in the day’ was hugely popular. The interesting thing about Pleyel from what I gather via the Wikipedia link below, is that his popularity was due in some part to the simplicity of his compositions. Easy listening!
https://en.wikipedia.org/wiki/Ignaz_Pleyel
Here’s his concerto for Clarinet in B flat major followed by the Sinfonia Concertante for flute in B flat major. Both pieces are the second movements.
Concerto for Clarinet in B flat major 
Sinfonia Concertante for flute in B flat major