5. Van Halen, 'Van Halen'
The Van Halen brothers started making music with David Lee Roth in 1974, but they wouldn't release their debut album for four years. During that time, they honed their live show and wrote a ton of songs. The best of those tracks wound up on their 1978 LP, without a doubt one of the best debut albums in rock history. Side A almost reads like a greatest hits album: "Runnin' With the Devil," "Eruption," "You Really Got Me," "Ain't Talkin' 'bout Love" and "I'm the One." Then Side B kicks off with "Jamie's Cryin'," which goes right into "Atomic Punk." It's astounding. They've cut a lot of albums since, but this is their masterpiece. If it was the only album they ever made, they'd still be rock legends forever.