Jackie Wilson was one of the most important agents of Black pop's transition from R&B into soul. In terms of vocal power (especially in the upper register), few could outdo him, and he was an electrifying on-stage showman. He was a consistent hitmaker from the mid-'50s through the early '70s, although never a crossover superstar. His reputation isn't quite on par with Ray Charles, James Brown, or Sam Cooke, however, because his records didn't always reflect his artistic genius.