What are the best international marketing/brand agencies to work for?

Before you look for these agencies ask yourself: 

1. Can they really 'Do It All'. Inbound, Outbound, Content, Mobile, etc. 

2. Do i get to work with the bosses directly who have more than10 years experience in digital including some awards or amazing case studies?

 3. Is the environment nurturing where there's lots of responsibility and ability to grow preferably on a global scale?

 4. Are these guys providing media solutions (PPC, Display, Publishers, etc) or real marketing solutions including product development if needed.