I don't think this is the best, at least not yet. But A LOT of people have a shot at winning.

In my opinion....People I thought had a shot to win at some point from The Top 12 onward

Season 2: (Ruben & Clay)
Season 3: (Fantasia,Diana,LaToya)
Season 4: (Carrie,Bo,Nadia)
Season 5: (Ace,Chris,Elliott,Katharine,Kellie,Taylor,Paris,Mandisa)
Season 6: (Blake,Jordin,Melinda)
Season 7: (Carly,Michael,David A.,David C.,Jason,Brooke)