I write HTML by hand and one thing that's come in handy is HTML's built-in functionality for author-defined custom elements. We use ICON-LIST which wraps a UL and optionally an SVG if you don't want to use the default checkmark, and STAR-RATING which displays a rating out of 5 SVG stars. They aren't my most-used, that's probably P or A or LI or DIV or SPAN by number, but they're some of the most important I use frequently!