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Pain of Salvation is a great one too. And they have a new album coming soon.
Protest the Hero is a must mention as they are pretty left in their lyrics.
Destrage also has a really cool song called "Hey, Stranger!" that is about open borders.
Caligula's Horse is one of the best acts in metal right now. Check out Marigold, Graves, Dream the Dead, and Water's Edge
Cardiacs are rad af. You ever listened to Dog Faced Hermanns or Thinking Fellers Union Local 282? Not quite as proggy imo; but Cardiacs, on top of prog, are art punk/fucky post-punk and the aforementioned bands are prob my favorite related to that (especially TFUL 282, eventually I will find someone to love this weird, warped ass band that aren't people on rym that I don't interact with)
For TFUL definitely check out Strangers from the Universe first, def most accessible and just their best imo.
And dude if you have a link to your dad's stuff I'll totally check it out
Is it this band?
Okay I definitely dug the new wave stuff (also listened to lost summer of love), but this right here I fucked with pretty hard. Cool shit, I'll check out the other stuff you linked when I can