Well, this is a topic i can get into. I have had many breeds and for 20 years we showed and bred bloodhounds. The dogs on your list are all nice but have drawbacks, the dogs that are in the hound group are either going to be scent, nose to the ground and hard to control when on scent, can never be off lead. the greyhound and other sight hounds see something like a bird a cat a rabbit and woosh off they go no lead no stopping them. hounds are the hardest group to obidience train, that is why you never see many in the obedience competitions. the sporting dogs are similar but easier to train to off lead commands. my choice of the best on your list is either a lab, or a golden. They are very smart, that is why they as with the german shepard are used to lead the blind. i have a belgiun tervern and he is a very smart as are all herdind dogs, and are tireless. jack, is my companion dog he sits with me and will find things i drop and pick them up and put them in my lap. I am disabled and have very poor vision. he protects me and keeps me from tripping over things on the floor.
I also love the pit bulls but because of all the bad owners, not bad dogs, many places now automaticlly fine you if any pit bull or pit mix is run off lead, but they are very smart and extremlly trainable. Hope this helps you. I worked for a adoption center doing breed counceling trying to match people and pets, The one aim was if you get the right dog for yourself and family, we would never have to re-home it later.