It's so hard to distinguish the boundaries between SF and Fantasy these days, it's easiest to just use the term "speculative fiction" and have done with it. And yeah, Ship who Sang would be SciFi, though not particularly hard, even by the standards of the time.

I checked some authors web sites while researching this, and yeah, there's a number of authors in here I'd like to read...though maybe not as many as one would think. Also note, female SF editors are represented on this list as well.