Ok, I can try to do 2-3 paragraphs. I can normally pull off 2 is needed, but not always 3. The Game of Thrones setting should make it easier though.

I'd would be in favor of the "Same families, but replace the book/show characters with our own", or simply invent our own families. Both gives us a lot of freedom to do our own plot, and not have to worry about staying consistent with the series.