Which prophet confronted Ahab?

Answer: Elijah

Elijah the Tishbite confronted Ahab and prophesied a drought.

“Now Elijah the Tishbite, who was among the settlers of Gilead, said to Ahab, “As surely as the LORD, the God of Israel, lives, before whom I stand, there will be neither dew nor rain in these years except at my word!””— 1 Kings 17:1 (BSB)