Considering FUE hair transplant for my crown area. I'm a 43 year old male. (Photo)

There are two important issues here"The first is that you want to use FUE for a megasession. I would advise against this. FUE produces poor growth yields in general and causes more damage to the donor area thus decreasing the amount of grafts available for future use if needed. The second is that you want to fill a crown. Crowns usually take a large amount of grafts to fill adequately. It's not called the "black hole of hair transplants" for nothing. That said, based on your photos and age, you look like you would be a good candidate for an FUT megasession. This would give you the best chance for a significantly improved cosmetic result with the least amount of damage to your donor area.

It appears from your photos that you may be a good candidate for hair transplantation in the crown. You may also benefit from medical therapy as well. Please do your research carefully to try to insure your best cosmetic result. Crown hair transplantation is both artistically and surgically challenging, so pick your surgeon carefully.