“In case you missed it, B.B. King, one of the best of the original Blues players...”
Not really original, he learned to play from his cousin, who himself learned from older country blues players. So, he was more part of the 3rd generation/3rd wave of blues artists.
When I see original in this context, I think more that he was born in the deep south and made his way upriver, as opposed to the 2nd and so forth generations that were born in Kansas City or Chicago or any of the other way stations along the way.