Which son of Ahaz trusted in the LORD like no other king of Judah?

Answer: Hezekiah

Hezekiah son of Ahaz trusted in the LORD, the God of Israel; no king of Judah was like him, before him or after him.

“In the third year of the reign of Hoshea son of Elah over Israel, Hezekiah son of Ahaz became king of Judah. Hezekiah trusted in the LORD, the God of Israel. No king of Judah was like him, either before him or after him.”— 2 Kings 18:1, 18:5 (BSB)