Most blocks do not have enough artifact creatures to make a creature-heavy artifact creature-only deck, yet some of these cards have become tournament staples. My two favorites are shown below. These work as any other creature, are fueled by any type of land, and are either very vulnerable if the effect played against you affects artifacts, or good-to-have if the effect played against you reads something like "destroy non-artifact permanent."
My first favorite is
Solemn Simulacrum.
And my second and favorite super-mega-favorite is, of course, Wurmcoil Engine.