<font color='#000000'>Hmmmm...let's see...
For Wagner, it'd be mead, since so many of his operas are set in the Middle Ages or in the mythological past of northern Europe.
Bach: Bock. He was a good bourgeois German and probably didn't mind unwinding with a good hearty brew before going home to the Mrs. and their twenty kids ("Christoph Friedrich! Quit hammering on Daddy's clavier!"
after a rehearsal at the Thomaskirche. But never on Sunday.
I think Beehoven was a bock kind of guy, too. That and Gewurtztraminer.
Debussy and Satie: absinthe
Bebop: whiskey: straight, no chaser (good song title!).</font>