Ginji Amano would probably be even worse. With this Roster I think Enel would breeze past them.
He also wastelanded Sanji and Smoker (Vice Admiral) and effortlessly took over Diamond Jozu who was dominating Crocodile (a Warlord) and fought on par with Aokiji (Admiral). It should be a hard fight but I would slightly side with Kizaru as things stand. But I think Oda likes Don. He hasn't had any antagonist with as many impressive victories known yet as Don.