Also it can be a judgment call — e.g., The Easybeats hit with “Friday on My Mind”, but cowriter and band member George Young was the older brother of Malcolm and Angus of AC/DC and wound up producing a number of their albums.
Vanda and Young produced a lot of songs, like John Paul Young’s (no relation) “Love Is In The Air” (which is about as far from AC/DC as you can get).
For songs I didn’t like, probably one of the quintessential one hit wonders were The Blues Magoos — charted once, plllt.