Without doubt Jackson.
I saw his discomfort at the ARC. He knows. He knows it's wrong.
I've also heard from Paul Grundy he and his first wife were basically decent sorts, (I'm sure his second wife was a poor hard working islander who used to pioneer with them when he was a missionary in Polynesia, so I'd like to free her too).
I think hes a born in who was a seriously brainwashed child, his parents were hard core and converted Grundys family.
I think hes the most likely to turn, for sure.