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.
Whom would you made captain? Out of current starters, no one fits better. Several years back we had few players that could comfortably wear an armband. These days though we lack genuine bandiera and Bonucci is the closest we have.