Good work, Sam. "Tom Riddle that was" is a good allusion to Dumbledore in the DoM.

--unhealthy yellow of a diseased man.

Is a diseased person's *hair* yellow, or their *skin*? This isn't clear. Tom's hair wasn't yellow, and while grey or white hair on Tom would be normal by this point, I don't understand why it would be yellow.
Unless he had plugs put in from Lucius, like zoysia grass.