Some obvious value picks still out there, at least one of which I am sure to lose out on now, but with the classic rock killers row up next, figure I had better do this now:
Bruce Springsteen
What is there to say here? Obviously a legendary figure, and one of the greatest songwriters of his, or any other, era. Classics like Born to Run, The River, Thunder Road are no brainers, but my longtime favorite has been Glory Days from his 80s work, and his later career downbeat stuff has continued to grow on me -- Streets of Philadelphia was a constant when I arrived in Philly the year after that song won an Oscar.
P.S. I dedicate this pick to GGG who simply looooves The Boss.