Some linky goodness to inspire you:
Dan Krall is an animation designer with a tasty retro look. He's worked on Chowder, Foster's Home For Imaginary Friends, Powerpuff Girls, Samurai Jack and more.
Lou Romano is a brilliant colorist and has worked on a lot of the same stuff as Dan until he got a little job at some place called Pixar. He's also done some voice work there, including Linguini in Ratatouille. Check out the amazing color he whipped out in a series of doodles he did in a day.
And on another note, but deliciously retro, Japanese artist Koji Tomoto (Cozy Tomato).