I am blogger and looking for fresh content with no copyright issue.

I would like to tell you that Google search engine & their crawler is very smart. If you copy content from somewhere and paste on your blog or website, it is beach of Google policy & plagiarism deduct by Google search engine and your blog/website will penalized by search engine. So that don’t copy and paste content.

Article rewriting I don’t think it is a good option.

You may go for paid service. Hire a freelancer for content writing.