Stefansson could be considered a highly-acclaimed person who suggested zero-carb for everybody. He did a clinical trial where he and a colleague ate nothing but meat for a year. He also wrote a book about diet called "Fat of the Land".
There are plenty of nutritionists/doctors who suggest low-carb, such as Dr. Eades and Dr. Mercola, but I don't know if they would support zero-carb for children.
If your parents don't let you do zero-carb, or raw paleo, then at least try to get them to agree to a no-grain, no-junk-food diet as a compromise. That shouldn't be too hard.