According to this Bleacher Report ranking, Bergeron does not rank in the top 10 Bruins of all time. I beg to differ with that, I think that I would rate him ahead of Esposito on this list.
http://bleacherreport.com/articles/299641-the-10-greatest-players-in-boston-bruins-history
http://bleacherreport.com/articles/299641-the-10-greatest-players-in-boston-bruins-history