I saw him about a dozen times, mostly between 1978-84. He had Bobby Torello on drums, double bass mayhem...a real power trio.
Yes, he helped bring Muddy Waters to a new level of recognition and popularity, with a minimum of commercial concessions or false steps. He could have spent those years on his own career--the "Captured Live" album from just before that time, is quite energetic and good--or sitting on a veranda drinking cool beverages. Instead he helped out Muddy Waters, and didn't get much recognition for it for himself, outside of a small blues fanatic circle.
from Wiki:
"Winter also produced three Grammy Award-winning albums for blues legend Muddy Waters. After his time with Waters, Winter recorded several Grammy-nominated blues albums. '