Derived from Yorr, who is "identified as a Theor, but if you see how he actually spends his time, he’s really more of a praxic. He has turned green from working with chemicals, and he has a tentacle sprouting from the back of his skull. Always wears a white laboratory smock. Criminally insane. Always has a scheme to take over the world." On Earth this fits a classic comic book villain. Possibly a "Lex Luthor Sterotype" would be closest, where the weird head feature of Luthor is baldness rather than a tentacle?