When the long-running medical drama “House” ends, people will praise star Hugh Laurie, who for eight seasons has been riveting as the Sherlock Holmes-ish doctor Greg House. Laurie does deserve much of the credit for the success of the series, but the unsung heroes of “House” are often the actors who play patients. Some are rather famous — or would become famous after appearing on the series. Meredith Goldstein recalls her favorite famous patients and friends of “House” who made the show great.