Please try not to post two such similar polls within such a short space of time to one another.

Anyway, in answer to both this poll and your other one, I don’t think Glomgold was ever on the level of a main antagonist. He seems to have been mostly a nuisance, if a wildly entertaining one. Season two was probably him at his most dangerous, and even then he only really posed a significant threat threat after recruiting several other villains.

What about Magica De Spell mainly because before Bradford came along she was the show’s main threat.

I’d call Magica the main antagonist of season one. Bradford may have shown up before her, but we didn’t know he was a bad guy until after.