The first time I saw art by Thiebaud or Fertig it was at Thiebaud's booth at the now defunct Art Chicago. The progression in Fertig's work is fascinating. His earlier pieces were sort of classical in content and style--or they seemed to be. They gave the impression of looking back in time but the style was far different from the work of old masters and the English painters that SEEMED to be his analogs. In these newer works there is more abstraction, a hint of the surreal. His work has always been exciting and as he moves forward it will be interesting to see where is work goes.
Browns sea, in the photo, looks similar to Fertig but that is an illusion born of poor photography. His work does have an old feel to it but it's roiling sea is different from (and larger than) the Fertig pieces.
Santoro's work is brighter, airier than Fertig or Brown. His optimistic feeling imagerly is as comfortable as your own backyard.
Thiebaud's work usually takes the mundane as his subject matter. These things are then transformed; the lollipops above are an excellent example. He has also created landscapes using colors just slightly outside of the reality of the landscape depicted. He is the father of Paul Thiebaud.