Considering that my ancestry is northern U.S. and white (and most of these folks are presumed to be southern U.S. and black), I think I am remarkably close to Booker T. Washington (19 degrees), Mary Terrell (20 degrees), and Blanche Bruce (21 degrees). The next several, Harriet Tubman (23 degrees), James Augustine Healy (24 degrees), Viola Desmond (25 degrees), and Althea Gibson (26 degrees), are also impressively close. Only Barbara Jordan and Chuck Berry are more than 30 degrees away.
As usual, I am checking some of my connection paths for serious errors, but I have not yet found any (there have been some unsourced profiles, however).