'the mediocre "Dark Side"'
Dark Side is *anything but* mediocre.

I'm among the leagues of those apathetic to the Beatles. I don't hate their music, I just don't like most of it.

Anyhow

1. Jamie T. I would shoot that Londoner if I had legal immunity.
2. Other rap.
3. Mozart (OK, not really a band, but anyway).
4. Most modern 'rock' groups.
5. G4.