A fine list, all.

I'd have to add a few:

The late, great J.B. Hutto (a howlin', slidewindin' protege of Elmore James), Koko Taylor, Hound Dog Taylor, Luther Allison and Guitar Jr.

I did have the pleasure of seeing Muddy on his last tour; a moving experience in every sense of the phrase.

Billy Gibbons' guitar work on ZZ Top's First Album stands the test of time for me; kinda think he went downhill from there.