Al Kooper, by rights, should be regarded as one of the giants of '60s rock, not far behind the likes of
Bob Dylan and
Paul Simon in importance.
In addition to co-writing one classic mid-'60s pop-rock song, "This Diamond Ring" (though it was written as an R&B number), he was a very audible sessionman on some of the most important records of mid-decade, including
Bob Dylan's "Like a Rolling Stone." Kooper also joined and led, and then lost two major groups, the Blues Project and
Blood, Sweat & Tears.