Johann Ernst Eberlin
1702 — 1762
Johann Ernst Eberlin was a German composer and organist whose works bridge the baroque and classical eras. He was a composer of church organ and choral music. Marpurg claims he wrote as much and as rapidly as Alessandro Scarlatti and Georg Philipp Telemann, a claim also repeated by Leopold Mozart - though Eberlin did not live nearly as long as either of those two composers.
Adapted from the Wikipedia article on Johann Ernst Eberlin.
From the period sources
Johann Ernst Eberlin, a German composer and organist, served as court organist to the Prince Archbishop of Salzburg during his lifetime, according to the Biographical Dictionary of Musicians (1886). He was widely recognized as a “famous organist and contrapuntist,” and is credited with composing “a large amount of church music of an excellent kind.” His extensive output included Offertorium (published 1770), Improperia (1771), Graduale, Hymns, motets, Masses, Misereres, Fugues, Cantatas, and various occasional pieces. Eberlin’s influence extended to the next generation of musicians in Salzburg, as Anton Cajetan Adlgasser, who later became first organist at the Salzburg cathedral in 1751, studied under him there, as noted in A Biographical Dictionary of Musicians (1900).