I'd say Rush. But they have been able to play like a 5 piece band for years (even before sequencers). So should they be disqualified?
For me it's still a toss-up/mood thing between ZZ Top and Rush.
PS: I heard years ago that Keith Richards once said
"ZZ Top is the only band that can blow us off stage" A reliable friend told he read this in an interview, I've yet to track down the article, but I can see Richards saying this.