One Panel #667: Before Copperhead, There Was...

From "The Snake" by Jerry Siegel and Leo Nowak, Superman #18 (October 1942)

...the Snake! Like, are you telling me this guy WASN'T the inspiration for the villain who first appeared in The Brave and the Bold #78 (by Bob Haney and Bob Brown), fighting Batman, Batgirl and Wonder Woman? This art is damning evidence indeed!