The April issue of the Cartographer's Annual places the gorgeous mapping style of cartographer and illustrator Sarah Wroot at your fingertips. You can see examples of her work on the web and in several rpg publications.
Take a look at Sarah's excellent maps for the Dying Earth Roleplaying Game.
The Sarah Wroot style produces beautiful illustrative maps with colorful shading and finely detailed lines. Because Sarah has previously created some of the artwork for ProFantasy Symbol Sets (e.g. Symbol Set 1: Fantasy Overland), those symbols blend in perfectly with this style and increase your options manyfold.
The style pack Sarah Wroot Overland includes