Case in Point: King Snurre Ironbelly, the BBEG from the final module in the classic "G" series of early D&D adventures. Few miniatures could be more iconic than the heroes, and evil leaders, from the early modules. Not only did WOTC capture the feel of the original G3 artwork in this pose, but the paint-job is first rate.
Now compare this to the Aspect of Vecna, found in the fairly recent Dangerous Delves set of miniatures. Considering how iconic to the D&D mythos Vecna is (Hand and Eye of Vecna, Vecna Lives, Die Vecna Die, and Vecna Reborn), you would think they would have lavished more care and attention to that sculpt, and the related paint-job.