Bands/artists you never got to see live in their heyday, but would've liked to.

The Paul Butterfield Blues Band w/Mike Bloomfield
Bob Dylan in the Folk City & 'Blonde on Blonde' time frame
Joni w/Jaco
+1 Stones w/Brian Jones 
Yardbirds w/Clapton, w/Beck, w/Beck & Page
Early Fleetwood Mac w/Greenie
Led Zep early on
Allmans w/Duane
Little Walter Jacobs & the Aces

Bill Evans
Art Pepper
Andrea Bocelli

Traffic
Beatles
Stevie Ray Vaughan
Doors
Talking Heads

Did see:
Sinatra
Ella Fitzgerald
Allman Bros w/Duane
many many more

Going to see Steely Dan in Boston on 11/20...yeah baby!

Regards,
barts

@fbgbill

is andrea bocelli no longer performing???

@jasonbourne -- wtf dude

Beatles - without the screaming girls that made it impossible to hear them

Artie Shaw
Hendrix

saw most of the rock bands listed here, even remember a few of those shows.   50 + times, for Grateful Dead, SRV. 

I am grateful to have heard all the great bluesmen of the last generation.   No one could rock the house like John Lee Hooker.