Unless Harry is playing right into the BadGuys hands, I don't know why any of them would try to involve Harry in their plans (other than revenge and/or stupidity) ...
I think the Bad Guys may be beginning to learn their lesson. :-) Someone said there's a WoJ (I haven't seen it) that at this point, Nicodemus is
terrified of Dresden.
But previously? If (as I WAG) a bunch of the Big Players know about the Starborn thing -- know what it is, know (or strongly suspect) that Harry
is one -- then there's really good reason to involve him: they want to turn him to their side (or if they're Outsider (or ally thereof) get him
Killed Doing the Right Thing (or maybe turn him to Team O? because maybe he'd be as USEFUL to them as an ally, as he is DANGEROUS to them as an enemy... another WAG, that; and an especially
W one!).
Lots of Supernatural Hotness coming Dresden's way, and he's usually hard-up, and has a weakness for women... Temptations for power, too... Situations with knife-edge moral choices of
aaallllll sorts...
Plenty of reason to get Dresden involved! Including (as Marcone notes more than once) Harry's penchant for wrecking BadGuy(tm) plans -- if you're a BadGuy(tm), just clear your forces from the field, aim him at a rival, and... let Harry be Harry.
... Ortega was surprised when Harry "did the right thing" in Grave Peril, but I don't recall if Bianca was too ...
Oh yes, she very much was surprised. She evidently thought she had overwhelming advantage, and could force Harry to capitulate.
... Not counting the people in the next paragraph, are there any others who either explicitly planned on Harry furthering their plans or did something that makes it obvious that they planned it?
Harry points out (as part of deducing the Black Council) that the large amount of overpowered magic coming to underprepared practitioners in Chicago has not just "strained" but outright broken the bonds of credulity. Someone(s) has been sending them there (apparently aimed at Harry, I think... although I don't think Harry knows it yet).
Similarly, things like having
every kind of werewolf hit Chi-town simultaneously isn't credible as a "coincidence."
I don't count things like Nicodemus coming to Chicago to launch a Plague-Curse, that's just a tactical thing with the transit hub; also, a Big Player moving personally (not a puppetmaster trying to engage Dresden from behind a catspaw and two cut-outs).