Much like a one-hit wonder, but with bands that actually released a good song (i.e not Crazy Frog).

What bands can you think of that wrote a memorable, well known but fairly good song, before disappearing into the abyss of post-fame?

Most people know this tune, but the band is hardly remembered. Sound-tracked my Saturday afternoons circa 2003 (via Virgin Radio):

http://www.youtube.com/watch?v=zx5HuAPd6RM