Garrett Lisi, a theoretical physicist with no single academic affiliations proposed to the world a unified field theory combining the grand unification theory of particle physics with Albert Einstein's general relativistic theory of gravitation, using the largest simple exceptional Lie algebra, E8. Here is his original paper, and here is a summary of his work from NewScientist.
Although his theory is "simple" in some sense, it is never trivial. I admit I am ignorant in modern physics, but I believe this man has touched something serious or maybe fundamental. By watching the following two video clips (or watch it here and here), you can judge it yourself.