Dude, I know this isnt on your list, but I have been feeding all my dogs Nutro Max, Chicken rice and lamb, for 10 years now. It is a very highly rated food and none of them have had gas or any other problems on it.
I know Nutro Max has some types that are not high quality, but THIS particular blend has been stellar for us, without fail. And it is consistently rated at the very top of their product list.
If you look at this independent analysis, this food scored 10/10 on a very strict breakdown. It is in the left hand column on the page. Nutro Dog Foods - Healthy Dog Foods? Reviews and News
Like I said, not all of their food is great, but this particular blend and a few of their others are stellar. But I know it depends on the dog's chemistry as well. Im just letting you know that I have had awesome results with 3 very different breeds.