They really aren't great comparables though. The three guys you mentioned are counted on as their team's primary offensive source (and are utilized accordingly), yet complement that with good defensive play. Bergeron, on the other hand, is utilized as a shutdown player first and foremost, and complements that with good offense as well.
You mentioned a 1A/1B situation with Krejci, and that detracts from Bergeron more than anything. Krejci has always been the guy that gets better match-ups and better offensive linemates, whereas Bergeron just has to work with what is given to him (by far the best player Bergeron has routinely played with is Marchand, and he is known for going into month/s long funks). You would be hard-pressed to find one Boston fan or member of management/coaching that thinks Krejci is better than Bergeron, but Krejci gets utilized as the 1C because of how dominant Bergeron is defensively. If you put Bergeron in Chicago in place of Toews, where he doesn't really have much competition from other centers to be the primary offensive source, his offensive utilization and total minutes played would go up and his numbers would probably go up as well.