It's arguable. But Ike didn't have simultaneous command of both the operations up the Italian Peninsula and the post-Normandy operations in Europe, even though he was nominally the CO, Supreme Headquarters Allied Forces Europe. But for the Normandy *Overlord* operation in itself, Ike can be certainly be thought of as a great military leader.
Contrasted to MacArthur's operations across multiple Pacific islands, the Japanese Home Islands, the Gobi Desert and the associated C-B-I campaign, Ike's operations were more a study inpolitics and logistics. Which, with four stars, it pretty much is anyway.