Johann Schobert (c.1735-1767) was a harpsichordist, fortepianist, and composer. He was an important influence on the young Wolfgang Amadeus Mozart. Mozart borrowed melodies from movements of Schobert’s harpsichord sonatas and used them in some of his earliest piano concertos. He also borrowed other musical ideas from Schobert and built on those ideas in his earliest piano sonatas.
Here is a recording of Johann Schobert’s Piano Concerto in G major.