I didn't think so either. Do you know who he is?
No. Jimi worked with so many R&B bands in the years leading up to his success, that it could be any number of headliners he worked with. Notice the 'processed' hair style. That was near universal among black R&B artists of the day.
The guy in the photo has some resemblance to Little Richard, but I really don't think it's him.
“By the way...that’s not Little Richard in post 1.”
Looks more like Dave from Sam and Dave; but why would they be on the same bill? BTW according to Richard, Jimi was his opening act on many concert tours.