Examples of 'challenging' music, stuff you either find fascinating, or it being akin to fingernails being dragged down a blackboard.
I give you Scott Walker from his 2009 album 'The Drift'.
Merzbow is the most obvious fairly 'big' person
Well.
I was gonna throw in something like the Dillinger Escape Plan and you bring some fella with a bin lid guitar just playing feedback for 5 minutes.
Makes Dillinger seem like Blink 182 in comparison that.
Back to Billie Eilish for me then.
I just watch videos of her with the sound turned off.probably 90% of my music collect then, I even annoy myself with it at time and just listen to Dua Lipa