I doubt it. We've seen what other Wizards can do in the series, and it's pretty clear that Harry... to be blunt, he sucks ass at Wizarding.
Luccio was already a better fighter then him in the goddamn frontier days, and she's has a lot of time to practice since then.
Molly, his half-baked Apprentice, notes that he's not as good as she is at Tracking Spells, one of the things that Harry considers himself good at.
And then there's Butters, who's doesn't even have the ability to use magic- and somehow, is still better at being a Wizard then Harry. Jim has always been an advocate of skill>power, it's why Murphy can defeat people three times her size with supernatural powers.
Sure Harry is a walking artillery cannon, but most decent Wizards would wreck him, and Luccio's had a fair amount of time to adjust to her new body since we last saw her, so she's probably not as crippled as she once was.
That's a perspective, and not necessarily a invalid one. It's true that Jim often plays around with strengths and skills to create more interesting scenes - but that can lead to discrepancies in appearance. There is often a gap between what the author intends and the reader interprets, but that isn't helped when even Harry isn't the most reliable narrator.
However, when you look at his track record the results speak for themselves. No Warden (not even the dangerous old guard from before the war with the Reds) has achieved most of what Harry has achieved. No Wizard alive has taken out an entire supernatural power. No wizard among the wardens has repeatedly bested supernatural nations and entities to the level Harry has. As impressive as some of their magics might be, it's the results that count.
And then there is the argument of what dangerous or powerful really mean in terms of Wizards. The Merlin (Arthur Langtry) is both the most powerful Wizard in terms of magical muscle AND political and personal power. But it is well acknowledged that Ebeneezer is the most dangerous combat Wizard alive. He would be one of the few who might top Dresden for fights, and his kill count is clearly off the charts. But even he isn't the most dangerous Wizard. It is Rashid. And while Jim hasn't elaborated why that is, it isn't hard to tell. Rashid could cause more damage to the Universe than any of them, if he wanted to misuse/abuse his knowledge and position (not to mention if he simply failed or abandoned his duties). Beyond that, it is hinted between his age (and the knowledge and power that comes with it) and his possible (but likely) ability to gauge varying futures and their given probabilities it would be extremely difficult to out-think him. Not to mention what other tricks/skills he has. Every Wizard gives him major respect. As Jim has often shown and discussed - what really counts is knowledge, planning and execution.
Harry is simply more dangerous than most not just because of his skills, not even just because of his abilities (although I am not including his hinted at nature). It is also because of his connections, his timing, his planning, his allies etc.
None of which is to say Harry is bad at Wizarding. I admit I do find it odd Harry is more like a Warlock in that he mostly excels at destructive, flashy magic (maybe a hint...) and that he struggles with things like veils, but everyone has different strengths too. Truth is, most Warlocks might only be good at one or two things. Maybe some mental magic, or maybe some evocation. But the fact he can do a little of everything is important. As he points out in Skin Game - not just anyone can open a Way. It takes years of practice, study and discipline. Hannah Ascher was considered White Council level in terms of raw power but her skills and abilities were highly limited. Being White Council is both a sign of the practitioners raw power AND of their level of skill and study (generally). So the fact Harry can do veils
at all on top of the fact he can do everything else says a lot.
Maybe some Wizards would rinse Harry. But it all depends on why they were fighting, what preparation they had done, were they fighting fair or cheating, what equipment did they have, which allies were aiding them etc. There is no such thing as a truly equal fight (as any fighter will tell you) and you have to do whatever you have to in order to win. Anything approaching fair is too easy to lose, which is why most fighters will avoid them. But then again, some fights will happen because one or more combatants have little choice. Then, they just have to hope the enemy won't be as prepared or will make a mistake and they can take advantage.
So yes, sometimes Jim seems to de-power Harry and he doesn't always seem all that impressive. But most of the short stories from the perspectives of others seem to show Harry as terrifyingly powerful.
It's a complex issue but well worth discussing.
