The Scrappy/Music

Examples of The Scrappy in Music include:

Any time a band replaces the singer, he might become a Replacement Scrappy.
Person Man in They Might Be Giants' song "Particle Man" is clearly intended to be the scrappy of the comic book the song is about.
Back when rapper Chingy (yes, that's really his name) was in the group Disturbing Tha Peace, he was known as the black sheep of the group, though for good reason. The DTP single "We Got Them Guns" makes this fact painfully evident. At best, Chingy's a more derivative Nelly, which doesn't help, considering his beef against the rapper (both of them hail from St. Louis). It Got Worse when Chingy got so arrogant, he basically wanted out of DTP, because he thought he could reproduce the triple platinum success that he received from his one-hit wonder "Right Thurr". Chingy was the only person who seemed surprised that abandoning DTP was almost certain doom to his career...
Opera has quite a few of these; BBC Music recently did an article about it, in fact. They tend to be one-dimensional stock villains, especially ones who are ethnic stereotypes (such as Monostatos from The Magic Flute or Mime from Der Ring Des Nibelungen) or Purity Sues/Stus (for example, Don Ottavio from Don Giovanni).