I call bullshit on any poll like that, especially since four albums are by two acts, and it has TWO albums by a band that isn't anywhere near the pantheon of legends like The Beatles, Zeppelin, Floyd, Stones, Sabbath, Dead, Elvis (who, admittedly, is hit or miss on record), Hendrix. I'm referring to bands that literally STARTED a genre, not just took it to a new place. Admittedly, Radiohead is one of the five most overrated bands EVER for me, but still.
Sgt. Pepper? Zeppelin IV? Thriller? Sticky Fingers? American Beauty? C'mon.