There are many ways in which the word "exceptional" can be used. Many gamers will claim that a PC is "exceptional" if that PC had an "exceptional" impact on the quality of the stories they told -- perhaps even "just" by making the troupe laugh a lot. That's a very reasonable definition.
But in this thread, I use "exceptional" with another meaning, strictly related to the mechanics of the game: a PC is exceptional if, at least in some narrow area, he can achieve results that are at the limit of what any character "designed by the rules" can achieve. He is surprisingly exceptional if he can beat the intuitive expectation of what those limits are. This thread is for exceptional, and ideally surprisingly exceptional, grogs in the sense above. Post them, and comment on them!
Note that in some cases, small teams of grogs are more "(surprisingly) exceptional" than their individual members are. One such case can be made for a team of exceptionally well coordinated warriors. Such "(surprisingly) exceptional" groups fall well within the scope of this thread.
Surprisingly exceptional groups are one reason why I am considering grogs. There are two other reasons. First, because they are secondary characters, grogs can be very one-dimensional. It's ok if they are phenomenally good at one thing, and terrible at everything else, because you can use them only when the situation warrants it, and then forget about them. This is rarely the case with companions and magi, who are usually built with much more nuance, so that they can be viable in a wide spectrum of situations at least within the main themes of the saga. Second, grogs have more stringent limits (in particular in terms of Virtues, but also e.g. of having no Confidence) to character design. This makes optimization "with fewer resources" more fun (at least for me).