One of the greatest, unheralded bands would be Big Star. Sure, some of you might know them from their song, "In the Streets" which was the theme song for That 70's Show. They used the original for the 1st season, and then Cheap Trick performed it from there on. I feel Big Star, and more specifically, key songwriter, guitarist, and singer Alex Chilton is one of the great originators of the power pop genre. Their 1974 song, "September Gurls" is one of those great lost classics. It's one of those songs that when you hear it, you can tell the influence it had on so many other musicians. Even today, Katy Perry's producer was such a fan, that he asked her to spell out her song "California Gurls" with the "U" as a tribute to the band.
The song is ranked in the top 200 songs of all time by Rolling Stone magazine, but seriously, how many of you truly know it? I like the studio rehearsal version best, but here is the record version.