While it's true that you can't take the Nozomi trains with the JR Pass, it doesn't sound like the OP has to meet any deadlines, so the two Hikari trains per hour between Tokyo and Kyoto should be sufficient, especially since they take only about 30 minutes longer than the Nozomi. Business travelers who need to be places for specific meetings or who want to go beyond Osaka may find the Nozomi to be more convenient.