<Li> Little Charlie & the Nightcats </Li> <Li> John Littlejohn (April 16, 1931--February 1, 1994). Electric blues slide guitarist . </Li> <Li> Little Walter (May 1, 1930--February 15, 1968). Harmonica player and singer . </Li> <Li> Robert Lockwood, Jr . (March 27, 1915--November 21, 2006). Guitarist . </Li>

Who is considered the best-known chicago bluesman of all time