I have only been around high school bowling for about 4yrs now. The best I have seen would be Michael Poirier his senior year. He was good as an underclassman, but he really lit it up his last year with a 300 and a +800 series. Another individual I saw bowl once was out of Smyrna, Kyle Barnes. He did not bowl well the day I watched him, but his mechanics were smooth.
Picking one out of all the years and schools would be tough because there is so much talent out there. Tennessee is definitely blessed with some awesome talent.