This portfolio is minimal because that's my preference. But I can be fancy too. Here are some pages utilizing basic HTML5, CSS3, and ES6.
Photo Grid - A basic grid of photos, with good spacing.
CSS Selectors - There are... a lot of CSS selectors. I cram as many as I can into one page, and it looks horrific.
Bootstrap Basics - Bootstrap is fun. This page also shows off how to import a CDN document with SRI, or Subresource Integrity, a major concern for me (I like security).
Blog - I made a blog entirely from plain text and CSS. It doesn't have any links or dynamic content, it's just showing off text manipulation and Google Fonts.