maybe Perisic? Conte needs a ball playing CB for his 352 and we could use a wide forward option that contributes a fair amount of goals. Chiellini, de Ligt, Demiral and Rugani is a bit thin though, we might need to reinforce in winter depending on how things go for Demiral and Rugani.
In my mind it's Chiellini-de Ligt no questions asked. de Ligt is like Mbappe in defense, you don't put that kind of talent on bench for Bonucci and Chiellini is Chiellini. leader of our team, one of the best CBs in the game and should absolutely start whenever possible and reasonable.