Billboard 200 No. 1, 2000 Radiohead overcame seemingly insurmountable odds with this one. The album had next to no promotion, no hit singles, and featured a new, almost entirely electronic sound for the band that eschewed any resemblance of their previous sounds, especially the sounds of their hits. It was an experiment destined to flop, but it worked. It hit No. 1 and is revered today as one of the best albums of all time.
6. Beach Boys, "Kokomo"
Billboard Hot 100 No. 1, 1988 No band was less likely to hit No. 1 in the 1980s than the Beach Boys, who were 20 years past their prime and missing Brian Wilson. Against all the odds, they got one last hit single, though your mileage may vary on whether it was worth it or not.
5. Jan Hammer, "Miami Vice Theme"
Billboard Hot 100 No. 1, 1985 Oddly enough, theme songs have ever so occasionally managed to hit No. 1 on the charts, such as Bill Conti's theme for Rocky, "Gonna Fly Now". Still, it's always bizarre when people listen to one of these songs outside of their context. I mean, Cheers was popular, but not a lot of people were rocking the theme song on their Walkman.