I like all of these. I think I want kids that the PCs are likely to grow fond of, so that their default "shoot it in the head" approach to handling threats will be horrifying and give them pause. Like, offspring of their current love interests or whatever, looking up to these guys and trying to be helpful and brave and impress them and it's endearing. Making them some or all of a pack of sybarites with a disease vector garnish seemed like a good call, but I'll have to consider these others, too.
How did the hunting pack and collectors function in that game? Kids-as-condition might work, too...