Great White? 1 hit wonder, even if they had other popular songs, they had 1 "hit". You can be a 1 hit wonder and still be pretty successful (See Dream Theater).
It's been beaten to death on the forums though, that one man's "one hit wonder" isn't always the case for someone else. It depends on what you define as a hit. Certainly, #1 on the US chart qualifies, but what about #2? #5? #22? What about popular songs that didn't chart? You can argue it in so many ways.