Does Lynyrd Skynyrd count as classic rock? Their first big tour with the Who was when I first decided that I wanted a Thunderbird. Leon played the crap out of that and it sounded awesome. (I don't recall if that was all he played that night, but he definitely played it.)
John Entwhistle (the Who), Gene Simmons (Kiss), and Tom Hamilton (Aerosmith) also used Tbirds for some biggies in the 70s.
Granted they were all Gibsons, but the tone isn't *that* different.
Interestingly, John Entwhistle was playing Thunderbirds on the Quadrophenia tour that Skynyrd opened for. So both bands were Thunderbird-intensive that night!
Which night? 1973-Nov-27; Atlanta, GA; The Omni. We had cheap seats but moved in fairly close. We had to move a couple of times when seat holders showed up, but eventually settled for the duration- still up close.