Seven Deadly Sin Characters: Gluttony

Well, there's the lumbering ogre Big Mouth from The Smurfs, known to gobble down Gargamel's entire pantry in one pass.

Shaggy and Scooby Doo can inhale victuals as well. I theorize that Mystery Incorporated deliberately lets these two find the pantry, and raid it. A real ghost doesn't eat mortal food, and won't care much about these gluttons. however, if the ghost makes a point of scaring them away from the grub, that's a strong sign the "ghost" isn't so ghostly.

And, of course, Fat Albert can't get his body mass from sunshine and fresh air alone.

Kid goat (Billy)
Billy Boy
Southern wolf takes in a cute little goat kid, only to find he's no match for the little tyke's limitless appetite. Nothing is off this lil' goat's menu.
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The Greedy
Raggedy Ann and Andy: A Musical Adventure
Raggedy Ann and Andy meet a disturbingly amorphous giant named the Greedy. He's doomed to eat forever in his lake of taffy and candy for want of a sweet-heart

Futurama
Nibbler-Leela's pet/member of an ancient wise race has an impossibly large appetite.
..but since he's an alien, with an alien metabolism, eating 100x his body weight might be a normal amount of food.
Bender
Eps: Anthology of Interest II
segment Meatbag
Bender becomes human and finds the joy of food among many other vices. He goes overboard with no self-control.
Bulldog
Chow Hound
This bully of a dog scores big with his final scam and gets his dream,...far too much of a good thing. The dog is left immobilized by his own obesity after gorging on the entire contents of a butcher shop.The dog's end could compete with any of Alfred Hitchcock's creepiest endings
Cat:"This time we didn't forget the gravy"...

Heffer Wolfe
To Heck and Back
Rocko's Modern Life

Heffer chokes to death on a chicken while dining at Chokey Chicken.
He arrives in Heck and is compelled to view his many acts of selfish gluttony and how he hurt others.

Piggy Hammock
Pigs is Pigs
-and-
Andy Panda
Apple Andy
Piggy Hammock gorged at mealtime snacked unendingly, and couldn't get enough.
Andy passed an apple orchid and gave into temptation. He decided taking one apple wouldn't hurt, but reconsidered after the first and eventually finished off a bushell.
Both of these gluttons find themselves strapped into torturous automated feeding machines, and force-fed an unending amount of food. Luckily for them, the traumatic event turns out to be a dream. Lesson learned.


Straydog

There's also Greedy Smurf. Hoggish Greedily from "Captain Planet And The Planeteers" also had a voracious appetite.

One episode of "Clue Club" had a potential suspect named Mr. Glut, who seemed to have meals 24/7.

But the most infamous example of gluttony can be found in an early Little Audrey cartoon, "Butterscotch And Soda." Let's just say she suffers the consequences of having the tummy ache blues.

I know there was Tummi of the Gummi Bears who liked food--amusingly enough also voiced by Lorenzo Music who of course voiced Garfield.
If I'm not mistaken Healthcliff also liked food.
Slimer from the Real Ghostbusters liked food.
Then there was Usagi from Sailor Moon--at least in the first anime--she was always eating food. The manga and the Crystal version didn't hanger on that as much.