Pianist Sullivan Fortner and ensemble at Kennedy Center

It takes a uniquely jazz-bred humility to take a back seat in one's own band -- especially when one is part of the Kennedy Center's "Discovery Artist"series. But on Saturday night, pianist Sullivan Fortner was more than willing to give the spotlight to the members of his quartet (saxophonist Tivon Pennicott, bassist Ameen Saleem and drummer Jeremy "Bean" Clemons). Expert though he is on the piano, Fortner at this concert was more focused on cementing his ensemble together, and, when needed, spur...