Late last year, my father died. His health problems had been mounting so it wasn’t 100% a surprise, but still a shock that I’m adjusting to. Without getting into too many details, (1) he was a fat man, and (2) he lived significantly longer than the average life expectancy of men in the U.S. From about age 50 onward, Dad’s lifestyle was unusually healthy for our society: His work kept him outside and active, and he ate a wide variety of fresh, healthy food.
A single case doesn’t prove much, except that such a case can exist. Consider that, amidst the whole “obesity epidemic” furor, that it is possible for a fat man to live a long and healthy life.