One of my graphic design tasks at the University of Missouri is to create web banners for the main extension.missouri.edu homepage. Here are a few of the ones I've created, mostly in context. 

Graphics were made using either Illustrator or Photoshop, images provided, Shutterstock graphics, and occasionally content I made. They also required a mobile version, but I'll just show the first couple for reference. 

Because the text box moves to accommodate different browsers and sizes, the left half must be left mostly clear. The mobile versions do not have the same space limitation, but do need to reuse the same graphic.  

We sometimes use Shutterstock graphics to blend with our own content. These seasonal banners use a single image moved and masked in various ways.