Rex Murphy and Conrad Black seem pretty shrill to me.
Murphy is a curmudgeon, not shrill. I can't figure out what Black is. I like his diction. Sometimes he writes something I think is brilliant and inciteful, usually when he decides to agree with me. Other times I think he's gone senile or was driven most of the way crazy in prison. Most of his stuff is too lofty to be called shrill. He's an unapologetic old school upper class conservative, something you don't see much of in North America.