There were other competent illustrators working in Seattle back in the days when the Seattle area was far from the world-class place it is now. The same can probably be accurately said for many mid-size metropolitan areas back when the nationally-known illustrators worked out of the New York City area (mostly), Chicago (to a lesser extent) and San Francisco (somewhat). Today's example features Seattle, because that's the place I knew about at the time.
Rand was the top illustrator locally in part because his work was featured in Pendleton ads that appeared in national publications. The other local guy with national cred was cartoonist Irwin Kaplan, who I wrote about here. As I mentioned in that post, Kaplan taught a fashion illustration class, and Rand appeared there once as a guest lecturer. Later on, Rand taught at Washington; too bad I missed out on that.
A biographical note on Rand is here, and a two-page obituary is here. As best I can tell, he had little or no art training beyond high school, so he must have been a "natural." Also noteworthy is that, at around age 65, he shifted professional gears to become a prolific writer and illustrator of children's books.