1. Blackbeard, same scenario as Crocodile v Robin (20 %)
2. Law, special ally (5 %)
3. Coby, revenge (30 %)
4. Sabo, fire v ice (5 %)
5. Katakuri, revenge (35 %)
6. Mihawk, statement (5 %)
There are very few strong enough to beat Aokiji and even fewer that has any reason to fight him. I don't see Luffy, Zoro or Sanji take him down.