I could never pick one favorite, but the most memorable would be Taj Mahal, as a solo act - Just Taj, a Kalimba, and his steel guitar, Lenox Music Inn, early to mid 70s
He had the entire crowd of 12,000 people dancing for two plus hours.
He's one of those rare people whose every atom exudes a groove. Ray Charles had it. Tito Puente had it.