To avoid your previous resource pack mistake, the proper packs for those suggestions are:
- Isengard - Rohan
- Paths of the Dead - Gondor
- Lothlorien - Lothlorien
- Edoras - Rohan
- Helms Deep - Rohan
- Moria - Eriador (Keep in mind that this is waaayyy outdated, so its build quality is not as good. Its impressive because of sheer size)
- Argonath - Not sure about this one, it's either Rohan or Gondor. Though, considering that it's stone, both would work
A few more suggestions from my personal favorites:
- Ithilien - Gondor (In my opinion, North Ithilien is more beautiful because of the trees, but South is great too)
- Hobbiton, Bywater, and Longlceeve - Eriador (They make the favorites list not because of size, but because, if you try to get immersed in them, they make you feel the peacefulness of the Shire)
- The Minas Tirith basements - Gondor (A lot of new people have no idea these exist, but they are quite expansive and are worth exploring)
Even though the major cities and landmarks get mentioned as people's favorites, be sure to explore the small details and villages too. There are villages throughout the Shire, Rohan and Gondor, and our build staff spend vast amounts of time making sure the terrain is as good as it can be. Also, every house and building has a full interior and a purpose. These details are not what people are amazed by, but without them MCME would not be as good as it could be. Sometimes, since the small things don't have a huge impact in the movies or books, they can go largely unnoticed and can be under-appreciated.
If you know all this already, then just disregard it