Ursaring with Guts + STAB'd Facade. Throw in a Choice Band or Swords Dance for good measure. If this thing ended up a bit faster, it would be a top OU.
Alternatively, you could use a Swellow with the same set. Sure, it's weaker, but it might actually get a hit in, rather than dying before it even manages to attack.
Alternatively, you could use a Swellow with the same set. Sure, it's weaker, but it might actually get a hit in, rather than dying before it even manages to attack.