My favorite is Tere Goldstein. She's a local artist & my mom & I both have a few of her pieces. Here's her Fine Art America profile: http://fineartamerica.com/profiles/tere-goldstein.html
Lucio Landa's work is beautiful (pictures).
My favorite artist is Sean McMahon. His paintings are absolutely realistic, it is stunning. You can take a look at his work here: http://www.ascotgallery.com/pages/menu%20artists%20mcmahon.htm And Thomas Allen Pauly's paintings are in the same wave.
I like Susan Williams, she paints and she's also a photographer. And Cathy Sheeter's pictures are great. My mum recently made me discover Ophelia Keys (painting and drawing).