Thanks for weighing in. I've mostly imagined my IC (who is trying to get my MC to face fears) as Protagonist, but as I expanded my ideas (I was thinking there's a family member w/ dementia who can no longer run the ranch she built and is getting aggressive, so the relative trying to care for her would really be pushing to help her) it could be a different character... who might also be IC since the MC looks up to him.
I think that like my MC, everyone is trying to avoid suffering (is that too vague?), but trying to or hoping to exert more control than possible. The dementia can't be stopped. Fame is granted by and subject to the whims of the public, which can't be totally controlled. One can't hide from the world forever, at least without missing out on much better things. Etc. If that's the case, they will fail, but cope (I suppose that story form would be OS of Dream vs. Hope instead of my current Denial vs. Closure). If I say that they want happiness or to feel worthy of love, which I've also considered, then I suppose it'd be Success, but tempered by some Costs.
So for a Story Goal, I could have one character wanting love, another wishing to feel useful, and another wanting happiness and it wouldn't seem scattered? I guess you could lump that all under happiness since they'd be working towards that to be happy. I'm not sure how I could make that any different from an OS Concern of Innermost Desires. How would I determine an antagonist for all that, especially when the characters' attitudes generally get in their own way?
Now that I think of it, if the Story Goal is the end point of the story, I'm not sure that the wish to avoid suffering is possible since it's ongoing...unless there are specific events that they are trying to avoid.