Winston & Strawn LLP added Angela Rohman Russo as a partner.Russo is a tax attorney with expertise in advising on leveraged buyouts and other complex transactions ranging from several million dollars to several billion dollars for private equity firms.• Fox Rothschild LLP partner Gray I. Mateo-Harris joined the Leadership Council on Legal Diversity Class of Fellows.The program is designed to increase diversity at the leadership levels of the nation’s law firms and corporate legal departments. During the …