Radiohead were one of the most innovative and provocative bands of the 1990s and 2000s, five very serious Englishmen guys who developed their own sound and always tried really, really hard. The band, who were also the biggest art-rock act since Pink Floyd, began as purveyors of a swooning, from-the-gut sound that Alicia Silverstone aptly labeled as “complaint rock” in the film Clueless.