Complex sentence: Others--notably Duke Ellington, who became famous during the Harlem Renaissance at the Cotton Club--achieved much favored standing among members of his bands as well as other musicians because he comped enthusiastically in support of the soloist and did much to develop the technique.
Split into simpler sentences: Others--notably Duke Ellington, who became famous during the Harlem Renaissance at the Cotton Club--earned great esteem among band members as well as other musicians. Ellington comped enthusiastically in support of the soloist and did much to develop the technique.