Although it would be interesting if red John is someone in the unit is part of his group I hope not although I'm sure one of them will be revealed as a red John crony I think it is possible that red John died and reached out from the grave to deny Jane the peace of being without his presence in the world by giving everyone in his group to keep his memory alive with instructions or found an heir, although he would be as good as red John
Wayne- smiles way too much for nothing and in a previous episode was found to be easily hypnotised so easy to become a follower
Cho- he avoids all conflicts much like boscos assistant would, he also has many hidden and mysterious abilities
Van pelt- she was a newbie in the first episode and in a season five episode she wasn't yet hired it is possible that she was already a part of red John and when Jane joined CBI red John chose van pelt to join the team most likely having more than just one of his group applying for the job