A few random 90s ones I recall:
Babylon Zoo - Spaceman (although the version that became popular was actually from an adaptation for an advert, which the artist strongly disliked!)
Kris Kross - Jump
Scatman John - Scatman
Gloworm - Carry Me Home
Los Del Rio - Macarena
Stardust* - Music sounds better with you
(Though some may say this doesn't count, as it was a collaboration of artists and they only released one song under this name)
There are many artists that are erroneously known as 'one hit wonders' but did actually have other hits, however as their main hit was so much bigger, more memorable and longer lasting than their others, that they get given that label anyway.