Big fan of 'Eastern Man Alone' and also on ESP Silva's 'Skilfulness'.
Absolutely yes for 'Scorpio' and also the Coursil BYGs.
I played Simmons's 'Burning Spirits' yesterday, that fits no? Maybe not free enough I know you're a fan Pim.
Now I'm going to throw in a slightly left field suggestion and point at the Brotzmann quartet dates with Albert Mangelsdorff. Different lineage obviously but to my ears they fit some of your criteria.
I think it just didn't live up to the hype for me, and there was a lot of hype. When it was finally reissued I jumped on it but every time I played it I was disappointed. I have to say that the same but to a lesser extent is true of 'By Myself'. I'm becoming more wary of these reissued "grails".