On July 4, George “Mojo” Buford returned home to Minneapolis following a gig at Yoshi’s nightclub in San Francisco, where he performed with his fellow vets from Muddy Waters’ band, Hubert Sumlin and James Cotton. A day later, the legendary blues harpist went in for heart surgery and never fully recovered, according to family. Buford, 81, died Tuesday morning of heart failure at St. John’s Hospital in Maplewood. “He was doing what he loved to do right up until the end,” his son Abe said proudly. A native of Hernando, Miss., Buford said in a 2002 interview that he moved...