How about the 4C route (Canadian Coast to Coast to Coast) assuming you will be routing up to the arctic at some point. :)
I like your original premise which was a guy on a adventure tourer (not a dirt bike with bags) which means the highly technical stuff is a no-no.
But if the route could be mostly gravel or back roads (that includes paved but twisty) then great!
I think it would be important to schedule the 4C
to swing though a town/city every few hundred kms...not just for gas but to also allow riders the option to shuttle past certain sections of the trail by joining up to highway. Obviously you guys wouldn't need to map those spots :)
That would be the best of both worlds IMHO.
Keep up the great work!!!