Kite Man is a friendly as hell himbo who managed to get the misanthrope Poison Ivy to fall in love with him. Guy's got a big heart and a lot of endearing confidence despite being treated as a loser by many. I figure he could appeal to a lot of goons at the very least.
I was thinking this exact thing.
The same would probably stick to Marshmallow man and give him some sort of disgusting armor. Kong would have a hard time beating up a marshmallow covered in sand. They are incredibly durable.
Avatar may be popular, but I promise you if you put a Batman dog in a commercial it'll sell like hotcakes. Ace is also very well trained and could do a bunch of different commercial types.
I am also totally biased as I have a German Shepherd of my own.