Soul and R & B are mutually exclusive in my book but artists like Jackie Wilson, James Brown, Otis Redding, etc were instrumental is developing Soul as a spinoff of R & B. My personal favorite is Wilson Pickett....his version of Mustang Sally is perhaps one of the best songs ever done by anyone anywhere. JB and of course Aretha Frankilin would have to be right there as well. Tough question for sure.
R & B? John Lee Hooker would be my choice.
Good topic!
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