[Help] Informative article is ranking better than Best article

In my website Informative article is ranking better than Best article for main keyword.
For example i have an general informative article and "Best XXXX" article on website. I have interlinked from informative article with "Best XXXX" as anchor text to my "Best XXXX" article. Informative article ranking better than my main "Best XXXX" article. How to solve this problem?
Some times Ranking toggling between two articles.