Live concert: It's a tie:
The Who fronted by The James Gang and some weekends later Crosby, Stills, Nash and Young; both shows at Philadelpia's Spectrum the summer of 1970.
DVD concert: Peter Gabriel's Secret World
Honorable mention to ACDC's first US tour (Fayetteville, NC) and U2s first US tour (Chapel Hill, NC)...both a long, long time ago...

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)