Cirie's win is so satisfying after watching her getting robbed on Survivor 4 times. It is like a journey I waited to have a happy ending for years. So my suggestions will be casting people who almost their reality shows more than once.
Here are my suggestions-
Allison Harvard from America's next top model. She is a fan favorite and the face of the Creepy Chan meme. She may look too innocent for this backstabbing game but I think she can last long because she is not a threat.
Russel Hantz- This Survivor villain joined 4 times already like Cirie. He was runner up the first 2 times and he got eliminated early the 3rd 4th times. Maybe Survivor is not for him but traitors is.
Kaysar from big brother- He is a fan favorite who just can't win. Also a great representation for middle eastern Americans.
Charla and Mirna from Amazing race- These cousins are such fan favorites, some fans love them, some fans hates them. Their polarizing personality will be tv gold.