I will go with Nietzsche in response to your post. To his credit, Nietzsche said a few things which I think are very profound, including “That which does not kill us makes us stronger” and “When you look into an abyss, the abyss looks into you.” But when I studied his writings in college I could not comprehend much of it. The professor assured me that this was Nietzsche’s style, and that those who familiarize themselves with his style are able to grasp his concepts. Well, I guess I never got familiar enough to reach that point, because to this day I usually have no idea of what Nietzsche is trying to say. I think my reaction is the same as many people’s throughout the years.
So here is a philosopher who just about everyone has heard of, and yet his legacy is a small handful of notable quotations and lots of what many find to be incoherent jargon. In light of all this, Nietzsche is, in my opinion, overrated.