Three Dog Night were a hit machine in the '60s and '70s, but outside the Top 10 they let their freak flag fly. Their versatility was due to a trio of powerhouse vocalists—compare the gospel growl and simmering soul of “Try a Little Tenderness,” the Southern-rock feel and acid-rock guitar of “Heaven Is in Your Mind,” and the percussive bursts of organ punctuating the cruisy “Lady Samantha,” all buoyed by tight-knit harmonies that raise the roof.