I can’t believe no one has mentioned “Day Tripper” or “Ticket to Ride”...but Day Tripper particularly has that magnificent riff opening.
No one has mentioned has mentioned the long intro to “Locomotive Breath” by Jethro Tull either.
Well, Scott, you just did!
Great songs/intros all!
Too many for one person to tally!
Actually, see #118. :-)
You may like this version
Jethro Tull Ian Anderson Locomotive Breath Classical
https://www.youtube.com/watch?v=iHoeXnIgZVg