Showcase
Canada Goose
Canada Goose has been manufacturing innovative, high quality outerwear in Canada for over 50 years and their jackets are even more popular as a "fashion jacket" than a jacket to wear on the North Pole.
Their website is WordPress based and is kind of traditional in a good way.
Visit Canada Goose.
CMS
WordPressConversations by Nokia
Conversations by Nokia is a compelling storie about the global cultures, technology and people shaping mobile innovation. And of course it's purpose is also branding Nokia (which is needed badly).
Visit Conversations by Nokia.
CMS
WordPressUniverséries
Universéries is a hybrid site (html and flash build with Drupal backend) in two languages (English and French) which proposes an overview of several of the biggest television series creators, but also of those who work alongside them before they themselves go on to develop their own fiction series.
Pretty nice integration on Drupal.
Visit Universéries.

Sven Prim is a Swedish based photographer. His portefolio is build with WordPress and it's beautifully made with big images and an easy navigation. An elegant way to present an image gallery.
Running a content rich site on an open source platform is not a problem if you are aware of Drupal. The MTV UK site is running Drupal. The design of the site is not top notch, but it works.