The struggle for the leadership of embattled Nissan Motor Co. ended in an uneasy compromise, as the top contenders all got senior roles. The carmaker's directors tapped Makoto Uchida, 53, the head of its China joint venture, as chief executive officer, to work alongside new Chief Operating Officer Ashwani Gupta and Jun Seki, the new deputy COO. These three were all on the shortlist a week ago.