If you're using React, check out Material UI. I was a big fan of Bootstrap, but I didn't like that there was still so much for me to build. MUI comes with components for things like user avatars out of the box. But it doesn't get in the way at all either, it's very customizable at the theme and the component level (I'm using it with styled components, and I love not having to come up with class names for everything). I've also tried Antd and it's impossible to customize.