Nah, Blackbeard will have an unbalanced crew just like everybody else, hence why Shanks has three highlighted subordinates. We will be lucky if the Straw Hats fully get to take the Blackbeard Pirates down at this rate, and if they do, it wouldn't surprise me that Oda would stress two subordinates among the rest in a King-Queen fashion —he already started doing so with Shiryu and Laffite, so let's see if they end up being 2nd and 3rd strongest.