Carl Philipp Emanuel Bach - Organ concerto in G major
CPE Bach (1714-1788) was for me the most talented of the many composing sons of JS Bach. I especially like his concertos, clearly foreshadowing the famous Mozart ones. I have selected his Concerto for organ (or harpsichord), strings and continuo in G major, H. 444, Wq. 34, from 1760. Relevant links below.