Who was tthe third of the "Three Kings of the Blues Guitar," besides Albert King and Freddie King?
Albert King:  One of the "Three Kings of the Blues Guitar" (along with B.B. King and Freddie King), he is perhaps best known for the 1967 single "Born Under a Bad Sign". Freddie King:  He has been described as one of the "Three Kings" of electric blues guitar, along with Albert King and B.B. King.
B.B. King