It would be unfair of me to leave the top of great song intros without mentioning this one: Nether Lands by Dan Fogelberg.
It's from an album of the same name released by Dan in 1977.
The orchestral arrangement was by Dan and Dominic Frontiere and the orchestra was conducted by the latter.
I never really came across Dominic Frontiere before or since, except that I know that he composed the music for the '67/'68 TV show "The Invaders" (aside: I went back downstairs late on might when I was a young kid and my dad let me sit with him for a bit while he was watching this show. I can assure you that by the time I went to bed I was too scared to be able to get back to sleep!)