Nice list. I would second Ryuichi Sakamoto, Loscil, Julianna Barwick, Mary Lattimore, and Grouper for sure and there are lots of other good ones on there.

I'd add Windy & Carl, A Winged Victory for the Sullen, Yui Odonera (lots from the Serein label actually), Max Richter, and most of all Stars of the Lid.