Well, depends. He was chonky back in highschool. But, before he went to basic he lost all the weight and then lost even more, but he was discharged within a year. After that he kept the weight off and only got a little belly fat.
Otherwise the last I saw of him he was of average height, black hair, shaved, glasses and features I'd say were above average. He had a very good sense of hygiene. Though did fuck all except sleep, play video games, and work.
For the years I was with him his weight didn't really fluctuate.
And I suppose a loose version of Napoleon Dynamite? Mostly the nose is similar. The facebook photo you speak of was pretty old if I recall.