I'd have said Whyte vs Ruiz, that would be a full-on war. And if Ruiz is motivated, I actually fancy Ruiz slightly. I'm not so sure Whyte could keep Ruiz off him for 12 rounds. I guess out of those 4 it has to be AJ vs Fury.
AJ v Wilder is the fight I'd like to see most,then Winner v Fury. ps would not mind watching Wilder v Whyte.