chuck norris, adrian chiles, jamie carragher and lord heskey
Debbie Harry, Robert Smith, Morrissey, Kate Bush.
The right balance between male/female.
Celine Dion, Dido, Enrique Iglesias and Chantal K.
Why would I want four singers?
Or do you mean as backing singers. Sorry, the music I'm into requires 1 frontman, 1 guitarist (maybe 2),1 bassist, and 1 drummer...
Although a combination involving John Frusciante, Thom Yorke and Damon Albarn would be quite something
Harry and Niall from One Direction, Justin Bieber, and Kurt from Glee.
As long as I had a full jam band a la Snarky Puppy, I'd have Gregory Porter, Lalah Hathaway, Esperanza Spalding and Stevie Wonder.
John Paul Jones