This is an excellent video about some of the “forgotten” superheroes. Some more forgotten than others.
I knew about most of them. Read some of them. Have seen a lot of them in adaptations. The one I probably know the least about, though, is Doc Savage. And the explanation of his “powers” starting at the 14:07 mark about blew my mind. Seriously, they should’ve given the guy more abilities. Major eye-roll.