I guess I'm not quite understanding what defines "brilliant". No faculty at an R1 school, or even an R2 school is anything less than very bright. If they are, they get booted in their tenure track pretty quickly (about to happen to one of us here). You just can't float a turd. If brilliant means making breakout discoveries, again, I think many faculty members do. A media darling like Einstein or Edison or Watson and Crick is difficult to find these days, but that doesn't mean that there are less people making breakthroughs. They're just less interesting to the the public. An equivalent to relativity just doesn't sell newspapers anymore. There are people I know who have advanced basic physics significantly, but their advancements aren't tied to a war-ending bomb. You might even say that the problem is that the "rough" has become rather sparkly, making the diamonds harder to pick out.