We're running a campaign that's set post-Order 66, not long after Darth Vader was saved. I decided on a Kel Dor Jedi, a former Padawan on the run when his Master was killed in a Vader ambush.
From a modeling perspective, there really isn't any good models out there to portray a Kel Dor. Knight Models (from Spain) has a Ki-Adi-Mundi model that's a good starting point to model one.
Here's a Jedi Master from the Clone Wars cartoon.

This model is another candidate. Modifying this one will also be extensive. However, the pose is closer to what I want, and the armored plates give him a look that's more in line with my image of a post-Clone Wars Mercenary (née Jedi) look.