1. Pit bull
2. Rottweiler
3. German shepherd
4. American bulldog
5. Mastiff
6. Doberman pinscher
7. Siberian husky
8. Akita
9. Wolf hybrid
10. Great Dane
Note: This list is based on a variety of factors, including the dog's size, strength, temperament, and history of aggression. It is important to note that any dog can be dangerous if it is not properly trained and socialized.