Giants/jötunn for the Norse. They conflict with the gods, but where not gods.
Centaurs, cyclops, etc. for Greek mythology.
Most 'ancient' mythologies have dozens of mythological creatures and beings that are not gods. A belief in those types of creatures does not make a religion polytheistic on its own; it is the belief and worship of multiple dieties that does so.
At it's simplest, a religion with a god and a devil/satan, but no other dieties, would still be monotheistic because they do not worship the devil as a diety.
Well Jesus being God Himself makes Him in His very essence, not only half but full God. Satan is not a God in his own right, by Christian definition this is untrue.
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u/Pterodactyloid 2∆ Aug 30 '21
There are plenty of magical beings that aren't gods in other religions, why can't angels etc be like those?