I personally would suggest a Boxer. We have a boxer and our friend has a Mastiff. The mastiff is a little bigger, lol but our boxer likes to play rough and has to date not been hurt by our friends dog. Boxers have high energy and love to play and can handle anything,lol. They are terrific family dogs and very loving and they especially love children. You just have to be willing to get used to their ADHD like behavior,lol. That is my suggestion.

Good luck!