George Michael's vocal range was unique, flexible enough for both sumptuous torch songs like “Roxanne” and explicitly political electro-pop such as “Shoot the Dog.” He ably took on house, disco, and even early hip-hop, as on “Wham! Rap,” carving a worldwide pop career first with Wham!'s ‘80s update of Motown optimism, then with his thoughtful and provocative solo years as a modern soul man.