Johann Baptist Neruda.
Frequently played on the classical radio station but I've only found one CD of his work... it's lame I tell you! Why is America so limited in our choices of composers? I checked out the SF Symphony schedule and it's mostly Mozart, Tchaikovsky and Hayden. Seriously, no Bach, no Neruda, no Telemann, no Schostakovich. It's our collective* poor musical education being pandered to by people who think that noone will come see these 'unknown' composers. Well you know what, I'm not going to see the known ones so what's that tell you? I dare say theatre is just as bad with its narrow selection of playwrights, but right now I'm ranting on music, so basically I'm saying there's this composer from the 1700's, I only learned about him recently, and I love him.
*Disclaimer; my music education was great, thanks ISOMATA, Mom & Dad, Buzz, Vic... I'm making sweeping generalizations on the poor quality of arts education for a large portion of the U.S.