The short answer
No. Aristotle had compared over a hundred and fifty constitutions eighteen centuries earlier. Nor did he invent the modern state, which was built by lawyers, tax collectors and standing armies over three hundred years, or reason of state, a phrase made famous by a book attacking him.
What he did do
Before him, the advice written for princes described the prince they ought to be. After him it was possible to write about what rulers do: in a living language, from evidence, about named men of his own day. His phrase for it, in chapter 15 of The Prince, is the effectual truth of things.
Bacon's thanks
In 1605 Francis Bacon wrote: We are much beholden to Machiavel and others, that write what men do, and not what they ought to do. He meant it in defence of virtue. You cannot join the serpent's wisdom to the dove's innocence without knowing the serpent exactly.
What serious people still argue about
The philosopher Isaiah Berlin argued in 1972 that what Machiavelli found was a moral structure: that Christian virtue and civic virtue are two complete systems of value that cannot be combined, and politics forces a choice between them. That is Berlin's claim about Machiavelli, not Machiavelli's about himself, but it is why he is still read.