Not the greatest guy, but his music could stir the passions:
Wagner: Descent Into Nibelheim
That is, if I was any good. I liked Rivera's song, but this is way better.
A few honorable mentions: Conquistador by Procol Harum.
Also Ride of the Valkyries. Maybe if I was good and was stepping up to the plate with 2 out, bases loaded, and down by a few in the bottom of the ninth. Change it up a little, you know.