Regarding the blog, a few agents are asking you to include a link if you have one. When I was querying, I included it with my contact information, but did not include it in the body of the query as a "selling point". Unless you've thousands of followers interested in you for your writing or your expertise in the subject you've written about, it won't help you to mention it at this point.
You can say a few things regarding the authors. If you believe your writing is similar in terms of quality or ingenuity, you can say something like "I saw that you represented name and name, and thought you might be interested in my science fiction novel title". Or, you can phrase it in a more complimentary fashion, like what you tried above.
Agents are just people who see a hundred queries a day. The quality of the query and your ability to explain your story should be your main concern. I do recommend that you send queries out to at least a few other agents before querying your dream agent. That way, if you get some constructive feedback, you might be able to strengthen your query before approaching your dream agent.