Dak
mentat
tbf there probably is a small percentage of people that are fat and healthy, in as much as "healthy" is defined along terms of longevity and not the ability to run a mile in a certain amount of time. I watched a shitton of Hogan's Heroes as a kid with my brothers, and it blew our mind that Leon Askin/General Burkhalter almost hit 100 and outlived almost all of the rest of the cast, despite being quite fat for at least the last 50 years of his life. Some people pack it away only in their bellies instead of their arteries I guess. Of course, Sgt Schulz died in his early 60s.
Longevity is not the greatest marker with modern medicine. We can keep a very unhealthy but medication etc regimen adherent person alive for quite some time past their more accurate expiration date. Plus there's always an anomaly possible. Schultz is more the norm.
Excess weight all by itself contributes to hypertension first and foremost, which when unmanaged destroys pretty much every organ in the body. Of course, the likelihood of finding a healthy obese person (and specifically referring to someone where the weight is coming from fat, not muscle; healthy meaning no sorts of diagnoses like hypertension, T2DM/PreT2DM, etc) over the age of 30 are rapidly vanishing.