season 1 - Gervase
season 2 - Tina W
season 6 - Rob C
season 12 - Aras
season 22 - Steph V
season 24 - Colton and Kat
season 25 - RC
Other possibilities that are being thrown out, Terry from season 12, Rupert from season 7, Natalie from season 16, Cirie from season 12, Candice from Cook Islands, Tyson from Tocatins.