Oh definitely, Williamson was the best Star Wars comic artist there ever was. Wheatley is the closest we have to a modern equivalent and I'm saddened that we might not get another comic illustrated by the man. Though he's worked for both Marvel and DC in the past, so never say never.
That said, of the four titles Marvel has put out thus far, Larraz is the best artist we've seen from them. The architecture reminds me a lot of Wheatley's work and feels authentic to the world. I think Curiel the colorist deserves a lot of credit as well for the atmosphere.