I have to disagree with the S-labeling and the Moron-labeling. Beck's style screams an extraverted and possibly ADHD iNtuitive who also happens to be a professional at bombastic ranting. He is a master of emotional manipulation and persuasion, who can bring the fringes to his side and send his enemies reeling back. And while this could all be part of an on-screen act, his persona, with all of the spontaneous antics and convincing emotion, is, even if contrived, unlikely to deviate much from the real man. His style is just that: His. What we see and hear on screen is, regardless of stage directions, 99% Glen Beck.
Back in my adolescent neo-con days, I loved LOVED Glen Beck for his oratory skill, obvious wit, sense of humor, and warmth toward the rest of the clan. Today, I can still accede that the man has an obvious moral intelligence and idealism, as indicated by his libertarian leanings and passionate convictions, love of moral principle, and gift of gab (most likely has a combination of high Fe, high Ni, and well-developed tertiary Ti perhaps).
My vote is ENFJ. Beck is certainly an emotionally-driven pundit, who gets fired up about moral/ethical issues especially. He is good with language, very outgoing, a good rabble rouser who is not untalented in the leadership department. He also loves analogies and theories, as anyone who has seen his show can attest (He just loves that chalkboard.). He is also a bit of a fetishist for moral rules, principles, and, like the typical right-winger, has a bend toward the defense of the traditional--he likes his ideas and values to be the time-tested ones.
I must also add that such a strong desire to discredit and discount Beck's ideas (for which his style makes a poor spokesman) and those of the associated right-wing/libertarian crossover called the Tea Party is disconcerting, because it shows that Beck's style of speaking, in all of its bombast, is as effective at sending his enemies running in blind ignorance as it is at drawing viewers through the same means. Let's not forget the fact that the man and his followers are, individually, no more moronic than the constituents of any other political faction this day or the last. Half of their perceived insanity is just culturally relative ( "Don't Treat on Me" is just not in vogue now). Most of the remainder is because, again, Beck style makes for a delivery that is polarizing in the worst way possible. As the emotions soar, both sides become increasingly irrational.