This is extremely interesting stuff.
The decade with which I am least familiar, by far, is the 1930's. I have only heard of a few names on the list, and have read little, if anything, by most of those whose names I recognize. (The early 1930's is much less familiar to me than the late 1930's.)
The decade with which I am most familiar is the 1940's, particularly the late 1940's. Of course, I read these authors in anthologies printed much later than their original appearance. I am pretty familiar with names from the 1950's and 1960's and 1970's, a little less so with the 1980's.
It's always interesting to find out about authors who filled up magazines but who are almost entirely forgotten.