Wrong. The Integral Designs Broad designs will.
No way. Well, I guess I don't know how he is shaped. I weigh 280 and my widest part is not my shoulders, which would fit just fine in a xpd-broad bag, but around the waist and elbows, which would not. The measurements on the ID bags are 68", 63", 45". Their middle circumference is 63" compared to 74.5" in the Big Agnes that I linked. The integral designs look about 2 inches wider than the Western Mountaineering at the middle (which I have tried and were definitely too small) so they may work. I think it will still pull a bit sleeping on the back with the elbows comfortably at the sides, but it may work. The Big Agnes, however, is much wider.