This guy's period was 1945-55, he was great. You can see where Jackie Wilson got his look from.
Update: The band accompanying Larry Darnell is the Paul Williams Band. Paul "Hucklebuck" Williams is in the checkered jacket and has a sax solo. Paul' Youtube channel is http://www.youtube.com/user/PaulHucklebuckWms. His website is www.PaulHucklebuckWilliams.com.
Sincerely, Lisa Y. Williams, (Granddaughter)