Social media expert

Looking for an expert in social media, who can also blog for me.
I have a newish business helping small business in the uk reduce cost in many different areas...
I need someone who can manage my Facebook, LinkedIn, and what other social media that would benefit my business.
I want them to help drive people to my pages and website to increase awareness and opportunities.
I also want this person to be able to be a good copy writer / blogger as I will need pages updating regularly.
This person needs to have seo ability and understand this as well.
I am looking for a true all rounder with brilliant English. They need to be self sufficient, and innovative as I won't be there every day to manage them.