I've been down the rabbit hole that was the Swedish "progressive music movement" ("proggen") of the 1970s, that at its peak made Sweden abstain from participating in the Eurovision Song Contest in 1976, two years after "Waterloo". Most of it is admittedly kinda crappy, but there's some gems. Like Tältprojektet (The Tent Project) of 1977 which was envisioned to re-ignite the movement but instead ended up being a bombastic finale.

Fria Proteatern was one of several free theater groups of this time, that was active until the 1990s. Their interpretations of Vladimir Vysotsky are pretty good, but with a lot less grit than the originals.

Röda bönor was a shortlived group of feminist music students with some really funny and sarcastic lyrics. "Det ska bli slut på rumban" is as far as I can tell not a rhumba, but asks what the women were doing while men made history.

What did the women do when the men wrote immortal works?

Did they stand and wash his perishable coats?

According to an interview, the boyfriend of Louise Waldén who wrote those lyrics was working on a song titled "One hand knows what the other is doing" at the same time. A decade later the cover version by Ebba Grön became one of the most famous songs of the Swedish punk scene.