Complex sentence: Notable artists on the label's roster during the 1970s included Betty Everett and Ann Sexton, although the label's only charting artist from 1971 to 1977 was once again Joe Simon, who hit with the single "Misty Blue" in 1972.
Split into simpler sentences: Notable artists on the label's roster during the 1970s included Betty Everett and Ann Sexton. However, the label's only charting artist from 1971 to 1977 was once again Joe Simon, who hit with the single "Misty Blue" in 1972.