Cahill, Stones, Jones, Smalling, Maguire, Keane, Mawson, Dier, Gibson, Dunk.
That's 10 options for the CB places in a WC squad. If he is considering playing 3 at the back, then he'd take 5 in the squad, but one of those would be nailed on as Dier, given that he can cover midfield as well...
United
City
Chelsea
Arsenal
Spurs
Liverpool
Those are pretty much the ONLY unquestionably 'big clubs' by all criteria you could choose to use.
Everyone else falls down somewhere, whether that be recent success, profile, gates, PL stability, ground, etc.
Plenty of others who are CURRENTLY...