Photo Blending Expert Needed

I need a skilled photo editor to blend 4 people from one photo into a group photo. The final image should have a natural look.

Requirements:
- Add 4 people to a group photo
- Match the original background

Ideal Skills:
- Proficiency in photo editing software (Photoshop, GIMP, etc.)
- Experience in seamless photo blending
- Attention to detail for a natural appearance

Please provide samples of similar work.

I have attached my attempt but lighting isn't right. I am ok if the additional 4 need to be placed differently for a seamless look.

I only need 1 group photo but gave multiple photos hopefully to make it easier on the editor.