Board Thread:General Discussion/@comment-34924658-20170828191655/@comment-1031724-20180514223737

I'd say Hyde for 6A (though, as mentioned, only for four episodes, and Jekyll wasn't revealed as a villain until the fourth), and Gideon for 6B (since he was made out to be the main villain at first but was working for Fiona the whole time who came in later), also Jafar for Season 6 altogether since there was the big suplot with Aladdin and Jasmine.