What a silly thing to predict.
Of the people I know well, and also know their types, the only ones I know that have been "fat" at various points in their life are an INTJ and an ISFP.
In all honesty, none of the people I have ever been socialized with for any regular interval/exposure have been overly heavy with any consistency.
I know ESTJ, ESFP, ESTP males, all are bodybuilders/weightlifters.
My wife is an INFJ fitness fanatic.
My former boss, female, is ISFJ and she is a hardcore runner.
I have several relatives, blood related and in-laws, that are at various stages of fat accumulation, and their personalities are so across the board that I couldn't begin to hypothesize as to a type predisposition(s) that have a higher than average chance of becoming obese.
In short, I think it's lifestyle related, or a state that anyone can fall into for a short period of time if they become depressed and do not seek help to resolve it.
I know many folks who have taken SSRIs and gained between 20-40 pounds. I know 2 people that have taken Depakote/Valproic Acid for bi-polar disorder and when they are being treated have gained 40+ pounds.
Bottom line, be happy with yourself, and be as healthy as you can be. This is not a dress rehearsal, make the best shot of the life you've got. Seeking to be more healthy is a good thing for anyone.