Jan Duursema
Her artwork gives character to such memorable faces as Republics: Quinlan Vos, Aayla Secura (her artwork created the character that Lucas liked enough to put in Attack of the Clones), Legacies: Cade Skywalker, Darth Talon, Dawn of the Jedi: Xesh, and even some classic marvel star wars characters.
You can see more of her art with links to buy it on her website, janduursema.com
Amy Beth Christenson
Video Game Concept artist for The Force Unleashed, Starfighter, Jedi Starfighter, Bounty Hunter, and ROTS.
You can check out the designs on artbyabc.com
Terese Nielsen
She did cover art for Star Wars Expanded Universe books and comics
This includes several X-Wing: Rogue Squadron comics, Union Graphic Novel, New Jedi Order novels Edge of Victory 1 and 2 and the Final Prophecy. She also did packaging at for Star Wars Miniatures: Legacy of the Force and Star Wars Miniatures: Knights of the Old Republic.
You can check out her art and buy prints at tnielsen.com.
Terryl Whitlatch
Worked in the redesign of some creatures in the Star Wars Special Editions (1997 version), creature design in The Phantom Menace. She also illustrated The Wildlife of Star Wars (a field guide), The Jedi Path and Book of the Sith.
You can check out her portfolio on ArtStation.
Adriana Melo
Comic book artist for several of the Dark Horse comics, including the first issues of Empire follow up Shadows of their Fathers, that were a follow up to the Republic Last Stand on Jabiim story arc. Luke finds out that not everyone thinks his Father was a hero of the Clone Wars in these.
You can check out more of her art on her DeviantArt page.
Christina Wald
Did illustrations for West End Games Star Wars RPGs including The Truce at Bakura Sourcebook and Tales of the Jedi Sourcebook.
You can find more of her current art on her website christinawald.com
Shea Standefer
A Topps trading card artist, she worked on Star Wars Galaxy Series including Rise of the Bounty Hunters. But her most unusual contribution is by lending her appearance for Scarlet Hark (Honor Among Thieves by James Corey) and Shaylai Veila from Dark Times: A Spark Remains (Dark Horse Comics).
Check out more of her art on Deviantart, including some cool familiar Expanded Universe favorites!
Bonnie Burton
While not directly related to the Expanded Universe, her work does have implications for the fans. For years she ran a blog on the StarWars.com site giving crafting tips for kids and adults interested in doing fun things with their favorite characters. She also did You Can Draw: Star Wars Characters for DK books. Perhaps the most fun is the Star Wars Craft Book. It tells you how to create a Momaw Nadon sock doll, Chewie hand puppet and action figure wreath. Obviously if you want to turn that hand puppet into Lowbacca the Jedi instead, you can! Nothing is stopping us from using Expanded Universe figures on the wreath either. While Momaw Nadon’s name and background come from the EU, its also no big jump to turning his sock puppet pattern into, say, Rorron Cobb, Ithorian Jedi hero of the Genndy Tartrosky Clone Wars, or one of the Moomow brothers of the Knights of the Old Republic comics too.