Who is named last in 2 Samuel 23's list of David's mighty men, thirty-seven in all?

Answer: Uriah the Hittite

The roll of David's mighty men ends with "Uriah the Hittite. There were thirty-seven in all" (2 Samuel 23:39).

“and Uriah the Hittite. There were thirty-seven in all.”— 2 Samuel 23:39 (BSB)