Or should I say "thank god"?

There's wolves, hyenas, dingos, and other sub species of Wild 'dogs' but I understand where you're coming from, dire wolfesque sizes would be appreciated

dogs evolved as a pack animal, so there was no evolutionary need for them to be bigger . although i agree that dire wolves would be awesome.

I don't know...Irish wolfhounds can get pretty freaking huge.

But... There are.
https://www.bigdogs.com/p/big_dogs_california_t-shirt/tee3304?pid=5160

Because they became Pokemon

Dire wolves were comparatively huge, I think.

um... Clifford. duh.

Bears are part of the Canine family as well, so we do have big "dogs"

Guys... https://karendingcsg.files.wordpress.com/2014/08/mjhg.jpg?w=528&h=352

Wolves
The thing you're looking for
It's wolves

Technically there's overweight bitches which are technically big dogs

Dire wolves would NOT be awesome. We are having problems in my area with coyotes starting to stalk people and they are relatively small.

I like dogs how they are...

Timberwolf

Dogs don't exist in nature. They are creation of man. If man found a need for a 500 pound dog, they would exist.

Newfoundland

Newfoundlands, mastiffs, wolfhounds, St. Bernards, Great Danes, etc. There are plenty of big dogs out there.

wolves?

Have you ever seen a shaved bear?

Great Danes