Abraham: Gen 25:12 Now these are the generations of Ishmael, Abraham's son, whom Hagar the Egyptian, Sarah's handmaid, bare unto Abraham:
Jacob: Gen 31:17 Then Jacob rose up, and set his sons and his wives upon camels;
Esau: Gen 36:6 And Esau took his wives, and his sons, and his daughters, and all the persons of his house, and his cattle, and all his beasts, and all his substance, which he had got in the land of Canaan; and went into the country from the face of his brother Jacob.
Gideon: Jdg 8:30 And Gideon had threescore and ten sons of his body begotten: for he had many wives.
Samuel's mom was a second wife: 1Sa 1:2 And he had two wives; the name of the one was Hannah, and the name of the other Peninnah: and Peninnah had children, but Hannah had no children.
David and Solomon, of course.
Ashur: 1Ch 4:5 And Ashur the father of Tekoa had two wives, Helah and Naarah.
Abijah: 2Ch 13:21 But Abijah waxed mighty, and married fourteen wives, and begat twenty and two sons, and sixteen daughter
Jehoida: 2Ch 24:2-3 And Joash did that which was right in the sight of the LORD all the days of Jehoiada the priest. And Jehoiada took for him two wives; and he begat sons and daughters.