Okay, if you want me to narrow it down to non-main characters:
"Ha! Not every spark is crashing around trying to take over Europa, you know! Some of us get to work on trains!" - A non-main character.
Granted, Bro. Matthias has his vices, but taking over the world isn't one of them.
And it's not just him. Master Payne's circus is
comprised of sparks. There's also Trelawney Thorpe, who seems content being a secret agent in England. We also have Dr. Sun, who is mostly content with just being a doctor in Mechanicsburg. I bet that I can dig up any number of one-shot minor characters, too.
You could argue that those are all
weaker sparks, and thus also aren't a good sample size. But even then, we have the Master of Paris, content with his city-state. We also have Theo DuMedd (of the Mongfish clan!) who isn't particularly hegemonic either.
It's also worth mentioning that the story of the comic is only gonna show us the most plot-relevant details, so it's not like we even have a view of the entire setting to begin with.
I'm looking at both (our forum's copy of) the Secret Blueprints and at your link, and while both say that the urge to
violently Show Them All is
common among sparks, neither actually say that it's
inherent to their nature.
There's also still the fact that, of the sparks who grew up under Baron Wulfenbach's regime, the ones we've seen on-screen are shown to be a lot more well-adjusted. This would seem to hint that the Baron actually
did create a system in which spark-adjacent troubles
can be significantly reduced
without just getting rid of all sparks. (I believe the novels actually imply it more openly.)
Not to mention how the Storm King also appeared to have set up a functional system while also allowing sparks to exist. In fact, the sparks who toppled his regime (those being the Heterodynes) were notably
not within his borders. The failure of both the Storm King's system and the Baron's rests on the fact that they lasted only as long as their leaders did.