It's hard to top this... the Jackson Five in 197x!
Warning: you must listen to this with real speakers (not thin phone or computer speakers) else you'll mis so much of the real sound. Whose the coolest? My definition: Embodies positive energy, upbeat, relaxed, fun, respectful, non threatening, and leave you wanting more... I'm sure that can be improved.In contrast, the Partridge family was really awsome, but not even on the same "cool" spectrum as Jackson 5.