She hasn't shown in a new story until The Sub-Mariner (1968) #33 - January 1971, according to
http://comicbookdb.com/character_chron.php?ID=1682. The three issues published by Marvel during the "official" Silver Age are reprints from the Atlas Era.
Only three appearances in the 70's, the two lasts in issues by Bill Everett : Subby 33, 50, 51 and I suspect that they are only flashbacks or/and cameos. Two reprints of the Atlas Era in Subby 54 and Hero for Hire 15.
At the end of the 80's, she appears in three issues of Saga of the Sub-Mariner, published in 1988 and 1989. It's not the Bronze Age anymore by the way. The listing is still interesting for the following decades. The first decade of the new century seems great for the character. Of course it makes me want even more an on-going Agents of Atlas title! AFAK she didn't make it to the cast of ANAD A-Force, did she?
I would really like to read the stories from the 40's : her creation under the pencil of Sydney Shore in May 1947 is clearly an attempt to introduce a bit of "Good Girl" art - quite innocent in fact - in the titles published at the time by Marvel-Timely, but I truly wonder how the character was written back then. (I should ask to Mantis Girl who owns the issue where she appears for the 2nd or 3rd time - two issues are dated of "Summer 1947" and in fact her first appearance in the Sub-Mariner Comics title !). Comics had moved from the war related themes at the time and romance comics were on the rise. I hope that the Marvel Masterworks from that era will be published someday - and not in a decade ! Of course Namora disappears with the other super-heroes in 1949.
For her characterization during the 50's I trust Bill Everett in the post-code Sub-Mariner stories from 1954 and 1955. He was very close to his sister and his mother, and according to an easy to find interview of his daughter was a great husband and father. The Marvel Masterworks Atlas Era collecting these stories has been already published. I see it on my shelves... I think it's time to open it...
Sorry to derail the thread with all these researches, but Namora being a Golden Age super-heroine, it's not that far from the problematic of the OP of Idisestablish. Perhaps it can help a bit giving some historical context.
I must add that all the characters listed in the OP are really extraordinary. I truly appreciate all of them even more realizing how revolutionary they were in the landscape of the Silver Age. I read all their first stories while I was a little boy in the first years of the 80's , and happily, while it wasn't intended, most of them are among the books and back-issues I collected this year! It's gonna be a real pleasure to reread them all once again.
That is a good project for 2016. so I guess that your thread is like a Xmas gift for me, Idisestablish. Thank you so much for it!
Of course I wish you and Reality (and ed2962 too) a merry Xmas - or whatever : at least a day-off I hope. Thanks again!