EASY.... a trio of

Bootsy Collins and his "Space Bass"
http://www.youtube.com/watch?v=cgrOD4PZzuY

Darryl "Chocolate Thunder" Dawkins "from the Planet Love-Tron" (a former pro basketball player)
http://www.youtube.com/watch?v=VRRTCq_jItc

"The Spaceman" Bill Lee (former Pitcher of the Boston Red Sox)
http://www.youtube.com/watch?v=cewha8jtOLI

....it's best to have an intergalactic assembly and I figure those guys know their aliens so they can tell us if they are good or bad right away