This list seems to exemplify Alfred Whitehead's statement that "the safest general characterization of the philosophical tradition is that it consists of a series of footnotes to Plato." (With many of those footnotes by Aristotle.)
It depends, really. As a Democritus fanboy I always take "offense" when hearing similar remarks, and I usually try (and fail) to make my point by offering a witty remark which might sound like Hobbes or Epicurus might have said it.
On a more serious note, this list is really bogus when it comes to "ancient Philosophy" because it ignores all the pre-Socratics. Ok, maybe some Sophists were not the most trust-worthy bunch of them all, but you cannot really omit Heraclitus or Democritus himself.