Background Replacement & Photo Enhancement

I am seeking a skilled photo editor who can replace the current background of my photos with a solid navy or an abstract navy/red/white design (similar to British colors - but not too obvious) and enhance the photos to achieve a high-definition look. The use will be for X(Twitter), FB & Instagram Profile Pic. So needs to look professional.

Key Requirements:
- Background replacement with specified design
- High-definition photo enhancement

Specific Adjustments:
- Removal of blemishes to achieve a flawless finish
- possible for forehead reduction / hairline

Ideal Skills:
- Advanced photo editing software proficiency (e.g., Adobe Photoshop)
- Experience with background replacement and photo enhancement
- Strong attention to detail

Please provide samples of similar work you have done in the past.