I saw the amazing prog band, Renaissance, open for an even more amazing prog band, Gentle Giant at the Shrine Auditorium here in LA. This was in 1976.
Annie Haslam’s 5 octave voice, with near perfect intonation, power and emotion, was always an amazing experience.
At the Santa Monica Civic Auditorium in 1978, I saw the band U.K. (Bill Bruford, Allan Holdsworth, Eddie Jobson, John Wetton) open for Al De Meola.
As much as I love De Meola, U.K. was the better band.