Of the Edain, I like your suggestions for fleshing out the Frame story. I agree that we're going to have to have different talking points for the council, and choose the order carefully to make both political sense for this Council meeting, as well as appropriate parallels to our main story. We'll want to plan out the main season outline (so we know what happens in which episode) before nailing down the frame, but this looks like a solid starting point for working that out when the time comes.
At the end of the season six frame, “Aragorn goes out into the Wild.” He should not be supervising the security detail of a dysfunctional group of geriatrics. I see no reason why Aragorn, were he to be present, would not have a say in the counsels taken. He was raised as an elf. He is the heir of Elendil. Galadriel shall set him up with her granddaughter. I do not want the meeting of Gandalf and Aragorn to happen here. It is contrived. Hurin shouts, “Aurë entuluva! Day shall come again!” I imagine the final shot of the frame to be from the perspective of spies that Saruman has sent to watch Gandalf as he goes north in search of Aragorn, who is among the Dunedain, and estel.
Sooo...a few comments on this. I'm willing to give you dysfunctional for the White Council, and I called them elitist myself. But 'geriatric' seems a bit simplistic here. I mean, I get it, they're all old, and Arwen is the youngest participant. But, they're not aging mortals, either, and Aragorn wouldn't mistake them as such.
Aragorn will *not* be supervising the security detail. Elladan and Elrohir, who have no interest in the Council themselves, will be supervising. The Dunedain will be serving as scouts/informants. And we will see that Aragorn is now with these Dunedain in the Wild - not leading them himself, but in the company of Halbarad, who will be the leader. Halbarad, of course, knows who Aragorn is, and so there's some deference there, but Aragorn will insist on not taking the leadership role himself due to how green he is. He wants to prove himself, but he has more humility than he did as a teen, and he's trying to do this right this time.
The goal is that we get a glimpse of him to see what he's up to since his declaration to go off into the Wild, but we're not going to spend a lot of time with him. Glorfindel will interact with the rangers, so he may well interact with Aragorn. Unless we come up with a really good reason, we likely will not show the Gandalf/Aragorn meeting in this season's frame. Neither of them is the central character, so it would likely seem jarring. The idea is to make that meeting very SIGNIFICANT for both of them. And especially for Aragorn to become Thorongil.