The Fifty50 theme (free) gives you 1 layout option which is your common style that most blogs have.

The pro version will add the minimal style as your second option. This will be a very basic concept with only the article and comments being displayed; ideal if you want to keep things very simple.

screenshot for the fifty50 full post layout setting
  1. Go to Appearance > Customize > Layout Options
  2. Look for the Post Style setting and make your choice from the dropdown list.
  3. Click the Publish button.

If you are curious why this theme has a limited selection of post layouts, it’s because of the split screen concept. This limits the number of possible styles within a single content column.