The George Harrison documentary focuses on all those big Harrison hits like "While My Guitar Gently Sleeps" and "Here Comes the Sun" but I think his best song is "It's All Too Much." I love the combination of the psychedelic intricacy of the instruments, the pretty melody and one of my favorite Beatles song lines of all time:
Sail me on a silver sun, for I know that I'm free
Show me that I'm everywhere, and get me home for tea
Interesting stuff about the song:
From the Beatles Bible
Notes by Alan W. Pollack
Wiki