Your first point that Loki thinks he is a person rather than a dog is because he is an English Bulldog. They all are entitled to every comfort their humans have. That said, Loki most certainly would enjoy and benefit from having a 4 legged companion, a playmate, BFF. Our 1st EB, Sherman, had a 4 yr. old German Shepard for his brother. Both were neutered males and they got along great. I don't think I would have one intact male with one that had been neutered. To me they are not on a level playing field. Usually bigger dogs are pretty gentle with smaller dogs. You'll find that having another dog will take Loki's attention away from you because he'll be so busy playing with his new buddy. If you get a puppy I don't think breed matters because they are being raised together. Getting him a buddy is probably the best thing you can do for Loki!