There are other great breeds but for a large dog in a family of small children, I can’t imagine a better family dog than a Labrador Retriever. I can’t help you with a breeder but whatever breed you choose, educate yourself about the necessary health clearances for that breed and make sure your pup’s parents have the correct ones. For Labrador Retrievers that is hips, elbows, eyes, CNM and EIC. IMO hips, CNM and EIC are the most important. I can explain further if you like, but not right now. Also, if someone tries to sell you a Silver Lab, run to another breeder because that breeder is either a liar and a whore or an uneducated moron. There is no such thing as a Silver Lab. The Labrador Retriever Club of America says so and they are the authority.