[Shaun]

It'd be unfair to allow anyone who won or was hugely successful (so no 1D, Little Mix, Leona, Rebecca Ferguson, etc)

I would pick:

Male
Aiden Grimshaw
Rhydian Roberts
Kevin Davy White
Jahmene Douglas
Wagner

Female
Ruth Lorenzo
Laura White
Misha B
Amelia Lily
Katie Waissel

Groups
Miss Frank
4th Impact
Union J


I didn't want to get bogged-down with "boys/girls/overs" because a lot of the boy/girl competitors would now qualify as "overs".