Of the breeds I find myself most attracted to the Great Dane, Shiba Inu, Smooth Collie, Bouvier des Flandres and the Dalmatian...yes I have very diverse tastes.
That is quite a diverse list of breeds. I think your best bet would be to go and visit some of these different dogs at various breeders' homes, preferably a breeder with a similar situation as yours (horses, bunnies, folks coming and going) and spend some time just hanging out with the dogs. Although some of the dogs you listed don't generally fit the situation you described (Shibas come to mind as a breed that would not like people coming and going; and you've listed a couple Herding breeds, which may not work with horses), so much depends on how they are raised.
I've trained and shown each of those that you mentioned. Of the breeds you listed, my favorite would be the Dane, but if you are wanting to show in US conformation rings (equivalent of our halter classes), you are looking at ear cropping (expensive, painful), and Danes ears are notoriously hard to get to stand well. Minimal grooming and lots of neato colors though. Fun as heck to show, but not particularly adept at the physical requirements of upper level obedience. Short lived.
Bouviers require significant grooming to keep in show coat; their ears are also cropped, but shorter and not so hard to get to stand. I found them among the easiest dogs to train and a lot of fun to work with. They reminded me of my Dobermans in personality, especially the males.
Back when I was showing, it took a big group of Dals to get a major, and it's a very competitive breed. I'm not sure what is required for a major these days. Although they are VERY active, they are really fun to be around if they have an outlet. Minimal grooming, no two look alike. Not a good first-timers dog for competitive obedience, but a blast to show in conformation.
I only worked with one Smooth Collie and he was a delight to be around. A lot less grooming than their Rough cousins, and talk about smart. The dog I worked with was frightenly adept at problem-solving. He was a talker; not loud or obnoxious about, but he did like to have conversations. Whizbang at obedience and agility and a good jr. handling dog.
I did some catch-handling for a friend of mine who bred Shibas, and one show was enough to turn me off of them for life. It could have been just her lines, but they were horrid animals to be around. They were on my very short list of "I don't work with those; let me refer you to someone who does" dogs.
Going by your list, some other breeds that have similar dispositions to the ones you've listed are Dobermans (not frequently owner-handled to championships), the Belgian trio (Malanois, Sheperd, and my favorite, the Tervuren), Mastiffs, Swiss Mtn, PWD's. You didn't list any hounds, terriers, toys or sporting, so I didn't go there; but there are dogs in those groups that may appeal to you as well.