If you can regard “Dancing Queen” as anything but an abomination of the lowest order, there is no point continuing this discussion. I wonder if years of treacle overdoses have affected your auditory center.
Success in achieving pop music perfection hardly qualifies one as an artist. Boy George and Tiny Tim have had pop hits. It’s not a particularly high esthetic bar.
Dancing Queen pops up on lists of the Greatest pop records of all time. No one remembers those artists you mentioned except as campy indulgences. ABBA is still hugely popular all over the world. Everyone from Bono to Elvis Costello to Kurt Cobain was a huge fan.