Assuming all are healthy

top 5 Cs imo

embiid

jokic

GAP

Gobert

AD(ik he is a pf but i feel he is better at c by a good bit)

Bam

Kat

AD seems to be a wildcard imo in such discussions as while he technically plays pf most of the times he is quite clearly better at c . Bam Kat is quite close but Bam's recent aggressiveness on offense has made me give him the edge