The Modern Fan Company
It is particularly nice to see such a hard core of modern design totally focused on fans. There are 18 minimal designs, mainly in brushed steel, which come with lighting and finish options. They include nice pics on the site of their fans installed in such places as the W Hotel and the Waldorf Towers.
Though The Modern Fan Co. does not offer online sales, it links you to stores all over the US that sell these designs. In other words, they are easy to get your hands on.