A well-preserved old man would have been far less evocative than the skeleton.
Than fix the script to reflect the fact that it's a skeleton and not a well preserved body.
Well, the old man in the picture still looks alive. I think he should look like a mummy. Dried out but still intact.
The reason I used picture of an old man sleeping was to sell the fact that he was a bit preserved and gives the impression that he died in his sleep. Even if you were to go with a dried up mummy phase, you would still have to change the dialogue to reflect the stages of decomposition.