I had covered basically all the pages listed in the Template Hierarchy:
404_template archive_template author_template category_template tag_template taxonomy_template home_template front_page_template page_template search_template single_template attachment_template
I'm using the front-page.php for my static front page and home.php for by blog index. So, with all that covered, what should I put into my index.php? Or can I leave it empty?