Dr John McDougall is an American doctor snd author who is the co-founder, chairman, and sole board member of San Francisco–based Dr. McDougall's Right Foods Inc. He has written a number of diet books advocating the consumption of low-fat, starchy food.
This basically is a LFHC Diet focussing on starchy foods like rice and potatoes. John McDougall suffered s stroke at 18 and is still around in his seventies so it must be a good diet! Actually I think it is as flawed as the LCHF one!
If you Google there are numerous videos and articles by him.