It seems like Americans forget how young their country is, it's barely a blimp in history so far, although recent written history makes it seem a lot older than it is.
Out of curiosity, who are you thinking of?
There aren’t that many countries that made it through colonization, industrialization, WWII and then decolonization and the Cold War intact. Very, very few virtually continuously. Fewer still as democracies.
However, I do think you're generally right - even under a more relaxed definition of what does or doesn't constitute a tyranny, the USA is clearly one of the first non-tyrannical states, at least among those that still exist today. The UK had a mostly-democratic ruling system for even longer than that.
On the other hand, if we define tyranny to refer to any state in which elections are restricted to a relatively small subset of the population, then the USA or UK are not that early. Voting in the USA was largely restricted to male property owners until 1840. Many other countries had adopted at least universal male voting by this time. The UK was even later to pass this standard.
Shouldn't be hard to name just one, then, rather a bunch of handwaving.