Yoast'ın kendi bloğunda önerdiği şablon şu şekilde. Bence hem site sahipleri hemde tema yapımcıları mutlaka değerlendirilmeli:

homepage

H1: Blog’s name
H2: Your blog’s tagline, if it’s “keyword-rich”; if not, all your recent posts should have an H2.
H3: Your recent posts, or, if those have an H2, this could be used for somewhat older posts.
H4: related content in the sidebar, like the heading of an “about” widget.
H5: Unrelated headings in your sidebar, footer, etc.

single post/page

H1: post / page title
H2’s and H3’s: subheadings and sub-subheadings
H4: your blog’s name, and possibly related widgets
H5: same as above: sidebars etc.

category / tag / taxonomy pages

H1: category / tag title
H2’s: post titles
H3: blog’s name
Rest: repeat from homepage.