A couple from the 1970s, and a couple from the 2000s. Every one of these were opening acts.
Ike and Tina Turner, 1971. Opened for B.B. King. Quite the double bill!
Derringer, 1977. Opened for Led Zeppelin. Rick Derringer got his start with The McCoys, who had a hit with "Hang on Sloopy" when he was 16. He then hooked up with first Johnny Winter, and then Edgar Winter. In the 70s, he was best known for this one:
Awesome Color, 2009. Confession: even though these next two are the most recent, I can't remember anything about them. This band opened for Sonic Youth:
Grass Widow, 2010. And they opened for Wild Flag.