Andrew Hill - Black Fire [Blue Note, NY mono, 1964]
I tried to listen to it as if I'd not heard it before to attempt to empathise with Mrs R, which was an interesting experience that I probably failed.
But it did highlight it as such a personal statement, quite without peer at the time that I'm aware of. It's one of those albums that I always find difficulty in choosing what to listen to next as if it's created its own musical environment, sui generis. And I do realise that that description probably reinforces Mrs R's point.