10 FORWARD-THINKING CLIENTS; Clients are often depicted as conservative corporate yes-men, standing in contrast to the Technicolor brilliance of the agency's creative wizards. This image ignores a number of brand-side marketers who bring guts and innovation to the business. Here's a ranking of 10 forward-thinking executives, and some takeaways that may help you become a better client. And we included five to watch for the near future