Anchorman: The legend of Ron Burgundy

I know it's kinda unrelated,but man my wife had me watch A Dog's Purpose... Dude I cried kike 6 times. Shit is vicious.

Scooby Doo

The Mask

Space balls although technically it's a mog!

Air Bud is a dog movie on the surface, but has a surpisingly well done underlying story of a boy struggling with the loss of his father.

I am legend.

And, if you're feeling brave, the original Star Wars trilogy

Supergirl

Cujo

Isle of Dogs. Not a dog movie but a coming of age with a lot of dogs.

"Good Boy". Its a pretty basic haunted house movie, from the perspective of a dog.

The Wizard of Oz, maybe? Toto is important, and moves the plot, but then, maybe he's just a MacGuffin.

A Boy and His Dog?

Finch

Post apocalyptic world with Tom Hanks, his dog and a robot.

Funny Farm, I Am Legend, The Outlaw Josey Wales

Would Wolf Children count? It’s about a single mum raising werewolf pups. Anime film.

Is ‘guy dies and is reincarnated into a purgatory-like existence of a sapient dog that lives with but cannot communicate with his family’ a dog movie that’s not a dog movie? Because if so, Fluke. (It is very poorly reviewed)

Dogville.

Or maybe I misunderstood the question, and/or the movie.

The dog is a drawing on the ground. It has a very small part, yet the dog won an award in Cannes for the movie.

So, like some sort of dog, not dog draft?

Prey.

Iron Will

Toy Story

Dog Soldiers

The Shaggy Dog?

Quigley (2003)