Looking to adopt dog

We are looking to adopt a large breed to add to family. We have 3 young boys, ages 11, 9 and 5 and are looking to welcome a dog into our family of the boys, two dogs, a purebred Irish wolfhound and a Maltese/Poodle Mix, an African Grey Parrot who is easily the smartest member of the animal family, and my wife an myself.
Breeds of reference would be mastiff, Rottweiler, bulldog (not a large breed but lovable) or boxer ect. Breed is much less important than temperament.
Looking for the right rescue. No need to refere to pefinder.com. We regularly monitor it. Please contact us for more information.