Thought this was cool. The Spider by Bruce Timm
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Found this as well. Baen has their Spider ebook for free on their website.
The first story is Satan's Murder Machines from December 1939, which was the inspiration for the mechanic monsters in the Fleischer Superman cartoon (as well as the movie Sky Captain) and was the inspiration for Stan Lee & Larry Lieber to create Iron Man.
The second is Death Reign of the Vampire King from November 1935, starring a villain called the Bat Man.