I know both Ric Flair and his daughter Charlotte Flair use "Also Sprach Zarathustra" by Richard Strauss which is also known as the theme from 2001 : A Space Odyssey Flair used the real one and Charlotte's is a remix. The late Macho Man Randy Savage used "Pomp and Circumstance" as his theme song which is the also the song you hear for graduation ceremonies at school. Daniel Bryan's music is also a real theme, it's actually Ride Of The Valkyries, which he actually did come out to the ring to before it was remixed to the one you hear now. Anything else ?