Sweet Child O'Mine has a great riff...
All above suggestions are excellent candidates too - check this out url for a "researched" list....
http://en.wikipedia.org/wiki/List_of_songs_in_English_labeled_the_best_ever
All above suggestions are excellent candidates too - check this out url for a "researched" list....
http://en.wikipedia.org/wiki/List_of_songs_in_English_labeled_the_best_ever