2 female St. Bernards and 1 male English Mastiff. Females in the 110-120 range and Mastiff is around 165-170. None are big by breed standards, but the Mastiff is one of the most athletic big dogs I've ever seen, and he's strong as hell.
Had a male St. Bernard that was around 180-185, but he developed bone cancer... What makes it even worse is that he was only a little over 4 years old...I know it's common in big breeds, but usually it hits a little later in life. That was sad, and I feel for anyone who has to go through that.