I create a website with a list of companies
If you assign a resource to it and do the emphasis, not on how to "lure" on site traffic, but already there come what may.
Targeted traffic is the most quality and valuable. News, and even steal -
unrealistic way of achieving the goal within the original purpose of your resource.
And on sabzh: page with list of news/articles (i.e., sections) will be in the index because of a "hodgepodge" posts from different sites will have its own level of uniqueness within your resource.
Page content news: if you do not use the data markup (which is not very good, but given the circumstances...) and search engines, because of their stupidity, will take the entire
content from the page (menus, blocks the announcements of the type "see also", "related news", "most read" etc.) and all this stuff will be part of the content that will be "diluted" in a brazen steal the news and a little increase % the uniqueness of the page
(depending on the ratio of the text in the news in relation to that junk, etc.).
But I don't understand why this pain? You just need to focus on what oriented resource and to improve the quality and convenience for people. And the idea of a news - utopian HS as me.