After watching "Freddie Mercury, the Untold Story" the other day, I'll go with Queen. What an absolutely heart-wrenching story about a fantastic, talented performer.....and what a great band Their "Live Aid" performance is perhaps the greatest live rock performance of all time.
I'd give mention to "Heart" for live music performance. I've seen them numerous times in various venues from small clubs to huge outdoor concerts. They've never disappointed, not a single time. They have the best live sound, and the accoustic sets I've heard are just simply amazing.