Perhaps some Schnausers? The full sized ones, not the minatures?
Tougher than a Wolfhound!
Only danger from the Wolfhounds was that they never bothered looking to see who was under them when they collapsed. Maximum squish. Or knew enough to climb from the backseat to the front at highway speed. And knock the car out of gear because they wouldn’t fit in just the passenger side.
I’d love to see a Wolfhound pacing by Trump’s side, looking like a guard dog, even if he wasn’t. He could even wear an earpiece for commands!