If the Avengers were cats, Tony would totally be a sleek Siamese in purrfectly tailored armor. And the Hulk would definitely be a big fluffy Persian - or a Maine Coon. <<<< And they wouldn't be the Avengers. They'd be the Aveng-purrs.
Spiderman the most realistic in Civil War. He gets knocked out a couple of times and has to stay down because he just can get up due to one to many hits to the head. Bravo Marvel for creating a super hero that's not all that super.