Terry Kath from Chicago

I don't think Terry Kath is literally the greatest guitarist but he has a seduisant style and he could play practically all styles. So he's my favorite. And I don't think his solo on "25 or 6 to 4" is the best, but the solo on "South California Purples" during his live at Carmegie Hall (there are rare lives songs of Chicago on Itunes for everybody who are interested in).