Board Thread:General Discussion/@comment-34924658-20160126075725/@comment-27463295-20160127001510

My opinion:
 * Season 1 - Regina, with Rumple as a secondary bad.
 * Season 2 - Cora, with Regina and Hook as secondary bads, and then Greg and Tamara 2x17+.
 * Season 3A - Pan.
 * Season 3B - Zelena.
 * Season 4A - Ingrid, with Rumple as a secondary bad.
 * Season 4B - Rumple, with Isaac as a secondary bad. No way Zelena makes the cut for me, but the Queens of Darkness are still debatable.
 * Season 5A - Emma and Nimue, with Arthur heavily in the flashbacks. Hook's reign of terror was too short amount of time and then Zelena just continued causing trouble here and there, but nothing too definite.