Social Distortion x2
Ian Anderson (of Jethro Tull playing the entirety of Thick as a Brick)
2 and 1/2 White Guys
The Vibrant Sound
Adam Haworth Stephens
Bob Dylan x4
Now for the Grateful dead related section. The following bands are essentially various incarnations of the grateful dead by members of the Grateful Dead after Jerry Garcia died.
Grateful Dead (I saw them twice with Jerry Garcia when I was less than a year old. though they're the only shows on this list I don't actually remember, I think it still counts.)
Rhythm Devils (Mickey Hart and Bill Kreutzman
The Dead (all members of the Grateful Dead minus Garcia.)( The Allman Brothers, and the Doobie Brothers both opened for them at this event at The Gorge)
And of course a handful of other local bands mostly that I had/have friends in. I also accidentally saw Macklemore and Imagine Dragons, both before anyone really knew who they were. But in all honesty, I can't stand either of them (then and now). I walked out on both shows early, so I don't count them. And man, this list would be twice as long if only I were 21! Missed so many amazing shows because of that.