I mean Edward Witten, one of the most prominent physicists alive. The fact that his name does not ring a bell is precisely my point. The names that do ring a bell are the names of folks who are "good at the media," not necessarily folks who are the best in their field.
Okay, given that the subject is theoretical physics and I'm not much into that field I understand why I have no recognition.
When looking at his Wikipedia I see he made Time 100 so it still might be worth knowing the name.