Is this a good thesis statement?
Out of all of the country music artists in the past three decades George Strait has remained the number one all around country and western performer because he is a singer, actor, and music producer.
Add a comma after the word "decades" to separate that clause from your main idea, and hyphenate "all-around". Beyond that, your statement should work well as a thesis statement.
You have introduced the main ideas that you will support and develop in the body of your paper: that George Strait is a highly recognized country and western singer; that he is an active and sought-after actor; that he is a successful music producer. Be sure to provide examples from within the country/western genre to back up each of these positions.
Your conclusion will then summarize the points you have used to demonstrate the reasons why Strait has continued to be so highly recognized for such a long period of time.