25yo man and I have a big forehead with a "V"-shaped hairline. What treatment would you suggest to improve my forehead? (photo)

If you are considering surgery it would be best to discuss your options with a doctor. You need to explain to your doctor your goals and expectations. The doctor needs to examine you to give you a better assessment of your hair loss and which procedure(s) will address your concerns.
The success or results of a hair transplant surgery is not about "how many" or "the number of grafts".
The results depend on a variety of other factors such as how long you keep your hair, how you style your hair, the hair color to skin color contrast, curl of your hair, the thickness of your hair.  If you have very fine straight hair that you keep very short, a hair transplant surgery will NOT look good.
The overall success of a hair transplant surgery depends on: (1) artistic and technical skill of your doctor and team (2) communication between you and your doctor to establish a realistic goal.

Hair transplants are a better option for you. If the hairline keeps receding (even if men in your family are not bald) then the incision is visible. The exact location of the new hairline depends on hair density, your goals, number of sessions you are willing to do etc. Schedule a consult for more detailed information. Best wishes

Lowering of a hair line in a male must be done with hair transplants. not with a hairline lowering surgery because as hair loss is progressive, if recession occurs after the surgery, a scar becomes apparent,