Remove negative posts on google search results (or push the down)

When you input my clients name into Google, i see one or more websites that speak negatively about my client. These are 9-10 years old and they keep coming to the top of google. This is what I need 1. Remove negative content quickly when you search our name 2. Boost ranking of 'positive' content 3 .Creates new, positive content 4. Post of positive articles, blogs, journals,forum entries, news items, press releases and other pages on a steady, on-going basis. 5. Optimizes positive content so that it rises quickly to the top search engine rankings. 6. Use my other domains to help with relevant keywords (if necessary)