(FORTUNE Magazine) – Style is hardly a prerequisite of power; Bill Gates and Warren Buffett certainly reign in their worlds without it, Hillary Clinton in hers. But those who manage to join the two successfully seem to hold an implicit edge--in the boardroom, with clients, over competitors. FORTUNE gathered several examples (shown here in their own clothes) from disparate corners of business. Among them: Hong Kong's Richard Li, son of billionaire Li Ka Shing. A financial services entrepreneur as well as a licensed pilot, Li likes to wear his custom-fitted suits with plane-patterned ties to suggest his love of flying. Helayne Spivak, worldwide creative director for Ammirati Puris Lintas advertising agency, occasionally adds a dash of leather to the usual corporate uniform. And CBS Entertainment President Leslie Moonves understands the psychological advantage he gains from wearing the right kind of Hollywood suit (you guessed it: Armani). The intangible quality they possess does not necessarily have anything to do with buying expensive clothes (although it doesn't hurt). It's about pulling it all together with character and, God willing, wit.