I'd have to say Mongoloid. It's a pretty catchy tune. Let us not forget that Brian Eno produced their first album, back in his prime, so the whole thing kills, front to back.
[youtube=425,350]s7PNzLDwrMM[/youtube]
(non-Eno, original version)
Their second album was pretty great, too. By their third they were kinda taking themselves too seriously.