This composer of The Musical Offering produced a work dedicated to Christian Ludwig that was comprised of a set of six musical pieces.
In one of this composer's pieces, Pales sings the aria, "Sheep May Safely Graze." He used trumpets and five voices to conclude the "Symbolum Nicenum" section of another work. This composer of Hunting Cantata and Mass in B minor based another of his works on a theme given by Frederick the Great. He wrote (*) 24 preludes and fugues in every key in a work named after a tuning system. This composer of The Musical Offering produced a work dedicated to Christian Ludwig that was comprised of a set of six musical pieces. For ten points, name this German composer of The Well-Tempered Clavier and Brandenburg Concertos.
In one of this composer's pieces, Pales sings the aria, "Sheep May Safely Graze."
Johann Sebastian Bach [prompt on "Bach"]