It was reported by one man who lived among the Inuits for several years that they actually gave the liver and all sweetbreads and most organ meats to the dogs, keeping the heart and kidneys for themselves and when shared amongst them, that wouldn't amount to much organ meat consumed.
Food was also boiled and roasted at times, and they actually admitted to preferring the taste of meat when it was cooked except for seal liver which was more savory eaten raw, if they happened to eat it, at all.
A study in the 1920's found that when on a cooked meat diet alone, just fat, no carbs, for one full year, the men did fine, experienced no shortcomings.
Many in the community of zero-carb eating have argued and testified that eating only muscle meat, even if cooked, as long as it's fatty and as long as enough salt is consumed, is sufficient.
I also doubt that veggies, at least those produced by agriculture today (in comparison to their wild counterparts), have that much to offer us anyways. I also don't believe fiber is necessary as fat alone helps things move through the intestines quite smoothly.