Advice on WordPress theme that meets requirements?



I’m looking for a WordPress theme to fit the following requirements:

  • Full width
  • Megamenu
  • Fixed footer menu with pictures (see site below)
  • Fixed menus so when someone scrolls the menu stays in the same place
  • SEO friendly where possible, not always easy with dynamic themes
  • Suitable for marketing a business (similar to how a law firm may have their site , but filled with page and blog content - don’t need eCommerce

Something similar in features as seen on this website below where the frame is fixed and the content inside moves when scrolling