My dog Chumlee seems to be a bit larger than everyone's here, though I will admit I didn't go through all 32 pages.
I took him to the vet at 4.5 months, and he weighed in at 66lbs. He's now coming up on 8 months on the 27th of this month, and I haven't weighed him since, but he has done nothing but grow since then! He isn't even close to fat, you are able to see a little bit of where his ribs end on his sides.
I don't know about his dad, but I saw his mom and she was about 105lbs, and not all that chunky, just a HUGE dog. Though I'm told the dad was bigger.