Which woman did Jacob love more than Leah?

Answer: Rachel

Jacob loved Rachel; after marrying both of Laban's daughters, he loved Rachel more than Leah.

“Since Jacob loved Rachel, he answered, “I will serve you seven years for your younger daughter Rachel.” Jacob slept with Rachel as well, and indeed, he loved Rachel more than Leah. So he worked for Laban another seven years.”— Genesis 29:18, 29:30 (BSB)