This chapter on important singers in the Schumanns’ orbit considers the careers of Wilhelmine Schröder-Devrient, Jenny Lind, Julius Stockhausen, and Pauline Viardot-García. It explores their work as a window into the general conditions of the singing profession during the nineteenth century. It also highlights their individual aesthetic and professional profiles with respect to operatic, concert, and salon performances, as well as, in the cases of Stockhausen and Viardot-García, their additional work as pedagogues and Viardot-García’s activities as a composer. The chapter also looks at the mutually influential and beneficial relationships between the Schumanns and these figures from both personal and artistic standpoints.