Some of you have some messed up definitions of rock music and "biggest."
Night Ranger? Barely sold 1/10th as many albums as REM or Nickelback. If we aren't including Elvis (and he definitely takes the cake if we are) it's between those two.
i mentioned simon and garfunkel in the other thread. bridge over troubled water is a top 100 all time hit and the contert in central park had over half a million people show up to it.
Shania Twain played Reed in 98 I believe and that was during her heyday. I got to meet her in her dressing room (not alone unfortunately). Never really cared for her music but she was one hot little spinner.
Well I'm showing my age (probably only Fast Fred will remember these), but here are a few I remember from the late 60s. Probably not considered "the greatest" but still memorable in their time.
Simon and Garfunkel -- probably the best of the group. Paul Revere and the Raiders -- actually pretty entertaining. I think every teenybopper within a 50 mile radius of BCS was there. The Association -- awesome live! Complex songs/arrangements/harmonies sounded as good as the recordings. Sam and Dave and the 5th Dimension -- damn good for one concert and at their prime. Lovin' Spoonful -- excellent performance but said absolutely nothing between songs and when they were done.
As a student worker I helped the roadies build and set up the stage for REM in 1989, one of his drivers came at me with some rebar because I smashed his foot, didn't work out the way he thought it was.
Aust Ag, the 1988 Aggieland, page 71...shows photograph and quote from Michael Stipe (which included the locally infamous "if you're in the military, quit now" quote). The date listed is "R.E.M. Nov. 19, 1987".