The current Ogres aren't really that bad. You may want to give them a second look as components, not assembled models. A lot of their "fatness" is in the gut, and that plate is a separate piece. I've done a couple Ogryns where I trim down the edges and just sculpt very basic abdominal muscles over the hole where the gut plate goes.
They don't look skinny, but they don't look like prime heart-attack material, either.