For sheer tone -- Eric Johnson at the Roxy Club in Wichita, Ks at the beginning of his Ah Via Musicom tour. He played for 4 hours solid as penance for being 1 hour late. 200 people in a small club and I was 5 feet from the guy all night! Incredible playing!For stage presence -- Buddy Guy at Rita's Little Uptown club. Buddy is just, well--Buddy!
For overall power over a crowd -- Godsmack on their Awake tour. I've only seen a crowd react like this 2-3 times in the 50+ concerts I've seen.
And any Rush concert I've ever seen. It just amazes me that three guys can do what they do.