It's best to receive a consultation to determine which option is best for you. I typically recommend hair transplant surgery (FUE or FUT) to bring down the hairline or forehead reduction surgery. Sometimes a combination of both may be recommended as well but depends on the patient.
GreetingsThank you for your question. Hair transplant would be the best solution for your problem. FUE is a surgical technique that moves individual hair follicles from a part of the body called “donor site” to bald or balding part of the body known as the “recipient site”. Grafts containing hair follicles that are obtained from genetically resistant to balding area transplanted to the bald scalp by latest minimally invasive technique Follicular Unit Extraction (FUE). It can also be used to restore eyelashes, eyebrows, beard hair, chest hair, pubic hair and to fill in scars caused by accidents or surgery such as face lifts and previous hair transplants.
You need an examination for a better understanding of what you want. The Internet will only give you generalizations. If you are considering a hair transplant surgery, you should see a hair transplant doctor.
The only way to address a large forehead is by having a surgery for reducing the size of the forehead. See video below