The Go Compare Guy is a fat idiot that goes around town annoying people with his lame song, and hypnotizing people so they use his car insurance comparison website, which is nothing but a bedroom-setup scam.
He lived in Loompaland for some reason but Nobody cares. During his childhood years, he invented his website and his song, and sang it to the Oompa Loompas and irritated them, so the Ommpa-Loompas invented a song to throw him out of Loompaland forever. He now roams the UnWorld, getting rich from his lousy website.