More and more I find myself afflicted with fellow travellers along the timeline who are never in doubt of their judgement, but they are frequently wrong nonetheless. There has to be some archetype from literature or Greek mythology that symbolizes this. Maybe there is some character from a Greek tragedy who, as a leader, was destined for a fall as a result of such a trait. Perhaps someone out there has a nominee for this position.
One sees examples of this in business organizations not infrequently. Some openly discuss their views, but often with the presumption of making a disclosure of “what we’re going to do”. Others sit quietly, rarely contributing to open discussions where ideas are put on the table for dissection. These fellows might listen to others debate, but they prefer to sit quietly and observe while others reveal the content of their thinking. Rather than adopt or synthesize new concepts openly, they will tend to note commentary that aligns with their pre-existing view. This is where that most loathsome of characters, the yes-man, can gain a strong foothold in an organization.
Lamentations on Chemistry 
You have to be careful to distinguish this behavior (sitting quietly and not contributing) from that of a classic introvert (Motto:”I’ll get back to you on that” a.k.a. “Shut the F&*%k up and let me hear myself think. Oh, it might be a good idea if you did that too.) The company that I work with has a lot of such introverts, and we have very quiet, but very effective brainstorming sessions.
Yes men have been known since the dawn of time, but are inherently limited from being an archetype as their existence is predicated upon the existence of a leader, someone who therefore dominates in whatever archetype the poet/writer/dramatist has deemed desirable. “Julius Caesar” is far more interesting than Caesar’s sycophant.
Well, I didn’t take introversion into account. I was thinking about management that, while unable to synthesize solutions to problems or even guidelines thereto, is never reluctant to use the power of veto.