Ian -
if you're referencing the series you did on your blog on the Top 25, I believe you actually had him ranked 5th (not 4th), in between Ross in 6th and CBM in 4th (and then Tillie, Colt and Dr Mac in 3rd, 2nd, and 1st). For Bogey's benefit, I'll note that you wrote:
"George Thomas combines strategy and flair as good as any architect that ever practiced. His landmark course at Riviera is a testament to his skill, not only in creating a spectacular course out of a congested box canyon, but how to create incredibly strategic holes with the use of slope and bunker placement. There is no course that I can name that asks a player to work the ball for position. His greens are largely underestimated since they are not as bold as other architects, but there are so many great examples of complicated pin positions made by swale or by slope that you begin to realize that his greens are not as subtle as you first think...The bunkering may be the most memorable feature with the wonderful shapes and edges that really have tremendous character. But you can’t talk about those bunkers without talking about the placement; he had a knack for pushing the bunkers into the landings to create angles, opportunities and generate the risk that made his courses so fun to play."