I would personally go with Golden Retrievers. My opinion may be a bit biased though because my best friend growing up had one and he was one of the most well trained and beautiful dogs I have ever seen. I have wanted a GR ever since I met that dog. I've seen many other people's golden retrievers and I can say the same for their dogs, very well behaved and very beautiful. Breeders can be expensive and if it was raised in "puppy farm" there may be many things wrong with the dog, it could come with diseases or medical issues that present themselves later in the dogs life. If you get it from a breeder just make sure it's healthy. If you get a rescue dog, make sure to read into it's background, you may not want a dog that was raised by an abusive owner as the dog may be aggressive, but that's up to you maybe you want to train it and give it a good home.