Here's a site I recently ran across and have been checking out.
http://www.pulpartists.com/Doore.htmlIt's devoted to pulp magazine artists but since there are a number of the artists listed there who also worked in comics it ties in with our art spotting too. Each artist profile has a biography by David Saunders, examples of the artist's work and signatures and usually a photo (or drawing) of the artist.
Among the artists I've run across that also worked in comics (and I'm sure there are more because I'm still working my way through the site) are Elmer Wexler, Alex Schomburg, Adolhe Barreaux, Pete Costanza, Henry C. Kiefer H. J. Ward, Max Plaisted, Joe Szokoli, Herb Rogoff, E. R. Kinstler, Allen Anderson, Norman Saunders, Rafael De Soto, Clarence Doore and Wally Wood.
Best
Joe