Could be taken two ways....Intro where the drums start the song? Or Intro where the drums come in even if in the middle of the tune.... if in the middle no more powerful intros than Stairway and In the Air tonight.
I have a bunch of favorites.
Currently, it's Jim Gordon's intro to a remix of "Apostrophe", from "The Crux of the Biscuit".
"Murder By Numbers" is also a favorite. "Superstition" never gets old, nor does "Walk This Way".