Agree, there’s some “Trenchcoat Brigade” aspects to Soothsayer (I used that term to describe his look during Adam’s stream of that cover, and Adam agreed), but Soothsayer is way too nerdy/academic to really be one since the actual Trenchcoat Brigade types tend to be solidly blue collar, working class sorts.
I think it really is that if you opposite Argent’s personality traits you just accidentally end up square in the “grumpy Brit magic know-it-all academic” trope, at which point you might as well lean into it.