Ski slope hairline. I'm not sure what procedure would fix my concern? (Photo)

F, 26, 145 lbs, my skin is combonation. Forehead is a bit oily. Now over the years one side of my forehead is bigger than the other. I'm not sure if I need more hair, to use filler (from what I read on google), or a forehead reduction. I was never diagnosed with PCOS, but I did have high levels of testosterone for a few years when I was 20. At 24 my hormones have been normal since. What do i do with this moutain ski slope hairline? I'm trying to insert photos, to show.