Figured it out:
So I placed the new file in the root folder, out of the theme folder, and gave it:
<?php require('./wp-blog-header.php'); ?>
<?php get_header(); ?>
Which called the header to make it think it was in the theme folder, or so it seems, and then I could give it the same values as index.php, minus the junk. This gave it the same look/feel as the index all post blog page, and gives me multiple main blog pages of the same type. Since this page doesn’t need editing, it’s irrelevant to have a ‘page’ editable, no problem.