So you just named two breeds that would be likely to challenge a husky. The problem with huskies is they are the most "wolf" of any dog I know. A wolfhound was specially developed to take on a wolf though and it would be difficult for the husky to dominate unless its naturally submissive as huskies are very small dogs. A shepherd also can challenge a husky and stand a fair chance, the husky would have them outmatched in bite power and speed BUT their muscle and weight would balance it out possibly.