What is the best procedure for me to get a more symmetrical hairline? (photos)

Yes, hair grafting/ transplant be an option or forehead reduction and correcting  asymmetry on your frontal hair line/forelock. I advice you have a FUE; you would get the desired hairline in just one sesssion of dense packing hair transplant

It appears that you are female and young. In my opinion, hair transplant is the better choice than forehead reduction surgery but they are both options.  I have seen many women experience thinning later on (after menopause) that allows the forehead scars to be very visible. Transplanted hair will always look natural and would blend in better with thinning hair if that should happen later in life. Most women opt for strip surgery (FUT) rather than FUE because it requires less shaving of the donor area.