Probably Zephyr, but she won't win. It's unfortunate though that there wasn't a stronger progressive who could have given the Republicrat a run for his money.
On a side note, according to the TheGreenPapers, there's also a guy by the name of Randy Credico in the Democratic primary for Governor, to, but he's just one of those joke candidates whose name if you type into Google will show you an article of him publicly drunk and threatening a police officer with an umbrella. So yeah, lol.
He sounds like he'd be a good governor