Christian Bravery, who founded and still works at concept art studio Leading Light, has been in the business for over two decades.
In that time, he's helped shape the appearance of franchises as diverse as LittleBigPlanet, Killzone, Borderlands, Fable, NBA Jam and XCOM.
Sadly much of that good stuff is, as is typical in the business, locked away under NDA. And some of this, I have no idea what it's from. But other stuff is from the likes of Borderlands, Killzone (see where the Helghan's stupid helmets came from!) and Black & White, so enjoy!
You can check out more of Leading Light's stuff at the studio's home page.