Well, content is really only ONE aspect of the entire equation. You could literally write a Nobel winning peace of work with the most ground-breaking discovery but it could be lost in the ocean of information in the internet.
So sorry. One good article or even one excellent article on a blog will not improve your readership by much.
Just think about it. What do people read everyday?
Why do people read newspapers everyday? If you can pinpont the reasons why people read newspapers, it should give you a clue on what readers are looking for in a blog too. Okay, there might be some difference but the idea is generally the same.