If it helps, I've written 12 articles on this site and I've had success with all of them. Before the days of the point system when Retrojunk used Stars instead of points, all my articles were 4 stars or better out of 5. Feel free to examine some of my work to help guide you.
In my experience, a healthy combination of trivia, research, great pics, and captions below the pics do the job nicely.
You can do a list or an article on a specific topic. all of which I have done. However, as of late, I've been trying different things--putting twists on the regular types of articles. I even did a swisuit article as a narrative.
Make sure you edit too. Spelling mistakes and errors in your statements just make you look stupid. It's a good idea to type your article into a word processor and post it in the site article manager when it's polished.
If you want any further advice, feel free to contact me via private message.
Good luck.