Getting back on the plot then, Eric Flint's
Belisarius series is being released (finally) as audiobooks so I've been listening to them at work. Now, as much as I love this series I do have to admit that the spirit of Mary Sue is strong with the main characters.
Yeah, it's basically "historical high fantasy" in terms of how fighty/sneaky/smart/etc the characters are, with a sort of borderline superheroic aspect.
The only thing that makes it work is that they regularly make fun of each other's foibles so much, which humanizes them a bit.
Come to think of it, this reminds me of David Eddings' writing style- traveling parties of hypercompetent characters who indulge in a lot of humanizing banter about who's going to do the cooking and stuff like that.
I think that fits for most of Flint's work, to be honest. Grantville is Mary Suetopia, after all
The thing is, Flint actually dialed that back a lot after the first few "main stem" novels of the setting. There's a lot of iffy choices in the first few books to be published (like, ones that came out over ten years ago now), and while Flint hasn't actually retconned those, he's shifted the emphasis away strongly from "aren't the uptimers from Grantville awesome" to "how are the downtimers reacting to the situation and how are they taking this broadly speaking 19th-century hybrid technological base and doing Cool Shit with it?" The physical presence of the uptimers becomes increasingly epiphenomenal in books titled "1635," "1636," or later.
Another part of the reason you get the "IT'S SUE-FUL!" problem is that the
1632 series started with an unapologetic populist/anti-aristocratic message. The population of Europe at the time was dominated by an aristocracy whose talent pool was really only being drawn from at most a couple of hundred thousand elites spread widely across Europe.
And the way Flint chose to express that populist message, rather clumsily, was to take the leading luminaries of an Appalachian small town circa 2000 A.D. and argue "these people, if put in a position to "have greatness thrust upon them," would probably do little or no worse than the knights and barons and dukes and whatnot who actually ran European countries in this era."
Which leads to something difficult if not impossible to distinguish from Sue-ism, even though I can sympathize with that message because it's broadly the same as the Stephen Jay Gould quote I'm sure a bunch of us here love:
"I am, somehow, less interested in the weight and convolutions of Einstein's brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops."