John Williams--Star Wars music

Sun, Led Zeppelin agrees with your statement in spades and actually, their plagiarism is almost beyond criminal it's so blatant. Dazed and Confused was ripped off and stolen IMHO, part of the main intro melody to Stairway to Heaven, many claim, is very similar to Spirit's 1968 song. Quite a few prominent old Mississippi Delta blues musicians had to sue Led Zeppelin to force them to grant them song-writing royalty credits.
Deep Purple's opening riff on "Black Night" has been accused of being lifted from Ricky Nelson's "Summertime". Although compared to Zeppelin, Deep Purple were actually choir boys in terms of cleverly plagiarizing legendary, obscure American blues artists.