German Shepherd
You probably did not expect to see this breed start out on the list, but when you think about it, they are one of the breeds that showcases just how dangerous they could be if badly trained.
German Shepherds have gained our love and attention both because of the media and because they are associated with police and military work. That is not for any frivolous reason, as they have shown just how much of a difference they can make and are extremely good at their job. They are a robust breed, intelligent yet also powerful and dangerous, as they can easily fight humans and also win.
Standing at over 2 feet tall and weighing around 90 pounds, you can see why they could be a danger to someone’s well-being and even be the cause of someone losing their life.
You may not think of them as aggressive and dangerous, but German shepherds are extremely territorial and very aggressive if challenged. They have been involved in a lot of biting accidents, both fatal and non-fatal ones. The silver lining is that they are highly trainable, and as long as you take care of them, you will not have any bad surprises.