Who is Stan Thomas from Stern Men and what is their importance?

Stan is a successful lobsterman on Fort Niles Island, earning the nickname Greedy Number Two while Greedy Number One is his best friend and former mentor, Angus Addams. Stan's wife, Mary, abandons the family mysteriously when Ruth is four years old, to give birth to a severely mentally challenged child, whom she raises in Concord, NH. Tall, handsome, broad-shouldered, thin-hipped Stan has discreet liaisons but never remarries. He is fastidious about his appearance, has dark hair, green eyes, and a mustache. He has a reputation as a cheapskate and a hustler, but Ruth chalks that up to jealousy among his rivals. Stan's boat is the Miss Ruthie and his buoys are painted red and blue.