The first woman who came to my mind was Kati Rubos, who appeared in the early nineties. She made a video for WPW when she was just 22, and she had a mind-blowing pair of 18- or 19-inch arms. At age 22! I think she won a Hungarian competition in 1993, if memory serves me, but that's about all I know of her. Anyone who loves girls with huge biceps should definitely check her out!
pretty good facebook page where you can see a lot of them : https://www.facebook.com/943597905844632
Kati Rubos for sure.
I'm not sure if you might say "underrated", i was too young for this, but Judy Moshkoshky doesn't come up as often as I might have expected after I discovered her. Phenomenal thickness and size.
I'd throw Nina Melidosian in this only because she has so little content of her due to her extremely short career that she doesn't get listed.
oof im downloading some renee johns right now, im glad it's in the queue!
Who are some underrated bodybuilding ladies from the 80s and 90s?