My vote for best music of all time, period, is The Throne Room.
Its the very last scene of ANH when Luke, Han, and Chewie walk done and get the rewards.
Peace is but a shadow of death,
Desperate to forget its painful past.
And though we hope for promising years,
After shedding a thousand tears,
Yesterday's sorrow constantly nears.
Unless a grain of wheat falls to the ground and dies it remains alone.