André 3000

Examples of Singing: "Hey Ya," "Prototype," "Roses"
It's apparent from Outkast's discography that Andre is musically diverse, but he famously took the plunge with an all-singing album—2003's The Love Below. Along with partner Big Boi's Speakerboxxx, the record won Album of the Year honors at the 2004 Grammys. It's a good thing when 'Dre sings.

Conclusion: We'll take the singing or the rapping André 3000, so long as he's making music.