Went for who I think CH5 would pick rather than my own opinion
BB1 - Nick
BB2 - Brian if all was forgiven and forgotten. If not, Helen?
BB3 - Kate
BB4 - Cameron
BB5 - Victor
BB6 - Makosi if she'd be allowed back in the country. If not, probably Maxwell?
BB7 - Nikki
BB8 - Charley
BB9 - Luke
BB10 - Rodrigo/Rebekah
BB11 - Josie
BB12 - Alex
BB13 - Luke A
BB14 - Dexter
BB15 - Mark
BB16 - Marc
BB17 - Hughie
BB18 - Isabelle