Without a doubt, the band I return to most often to make me feel better when I'm down is Yes. Widely criticized, even lampooned, for their often over-the-top writing and arranging, their music nevertheless gives me a lift.
One of the first songs ever written and arranged after Steve Howe joined the band, "Yours Is No Disgrace" is an eleven minute triumph. It would be almost impossible to get such a song released by a major label today; Yes got it through Atlantic Records without a care in the world. Please enjoy: