Our CB situation is kinda weird:
Silva - regressing, can show moment of class, but you can clearly see we should move on from him, saying this he is still our best CB
Disasi - average at best, his main asset is being healthy
Badiashille - after injury he is terrible, hope he will regain his form from last season (even though I think he is overrated, but it's my opinion)
Colwill - playing out of position as LB, hasn't shown anything special, bad defensively, so basically is huge question mark how would he play as CB
Fofana - injured for the season, huge question mark whether he will ever return to proper level,
Chalobah - injured, propably will leave us soon, and also nothing special besides being Chelsea homegrown
Gilchrist - young and inexperienced
On loan:
Bashir Humphreys - plays regularly in Championship, I have no idea whether he is good enough for us.
So we have many CB players, but noone world class modern CB. We are suffering badly cause no defender can properly play out of the back. That's why we are looking at ball playing CBs like Todibo.