Captain Slackbladder
Winger
Obviously it'd be a massive risk given how good a body puncher Canelo is but his best best is probably to make it a messy sort of fight and try and make his size and weight advantage tell on the inside. Might open him up to the body attack but there isn't a chance in hell that he's going to be able to outbox him from distance even with his physical advantages
Think Canelo will stop him late either way
Fielding obviously can bang a bit but he's no way a bigger puncher than GGG, even at a bigger weight. Cant see him keeping Canelo at bay, especially after 4/5 rounds.