Solomon
Ecclesiastes 4:8ESV·traditional attribution

one person who has no other, either son or brother, yet there is no end to all his toil, and his eyes are never satisfied with riches, so that he never asks, “For whom am I toiling and depriving myself of pleasure?” This also is vanity and an unhappy business.

Matthew Henry Presbyterian @wholebiblehenry

Here Solomon fastens upon another instance of the vanity of this world, that frequently the more men have of it the more they would have; and on this they are so intent that they have no enjoyment of what they have. Now Solomon here shows, I.

Commenting on Ecclesiastes 4:7-12

John Gill Reformed Baptist @doctorgill

There is one alone, and there is not a second,.... According to Aben Ezra, either no friend or companion, or no servant, or no wife, which last sense he prefers; no friend or companion he chooses, because friendship and fellowship lead to expenses; and no servant who would be chargeable to him; and no wife, which would be more expensive, and bring on a family...

Jamieson-Fausset-Brown Reformed @jfbcommentary

not a second--no partner. child--"son or brother," put for any heir (Deu 25:5-10). eye-- (Ecc 1:8). The miser would not be able to give an account of his infatuation.