In the course of the tutorial, you have listened to musical works created by…

In the course of the tutorial, you have listened to musical works created by numerous composers. Choose your favorite composer or musician and write essay explaining his/her significance in music history.
Some of the points to keep in mind while answering this question include:
?      new styles that the composer pioneered
?      new instruments used
?      new forms of music developed
?      musical virtuosity
?      artistic brilliance
?      volume of output
?      influence on later composers
?      versatility