Gianfrancesco Penni
Born in Florence to a family of weavers, Penni entered Raphael's workshop very early in his life, and collaborated with him on several works, including the famous Rooms of the Vatican Palace, as well as the frescoes of Villa Farnesina, both in Rome. Heinrich Wölfflin and some other writers credited him with the entire execution of the Raphael Cartoons, with Raphael only creating the initial design, though more recent writers believe Raphael did much of the work himself.
Sebastiano del Piombo
The death of Raphael in 1520, immediately before the exhibition of the two rival paintings intended for Narbonne, left Sebastiano clearly the leading painter operating in Rome. As his letters show, he immediately attempted to secure for himself the "Sala dei Pontefici", Raphael's next Vatican project, but was frustrated by Raphael's workshop, armed with the master's drawings, and his own inability to enlist Michelangelo's help, as the pope had told him to work exclusively on the long-promised Tomb of Pope Julius II. In the following years Sebastiano mostly avoided very large commissions for churches, and concentrated on portraits, where he had a considerable reputation, and religious easel paintings, such as his "Visitation" for France (1518–19, now Louvre), and his "Madonna of the Veil" (c. 1525), a very successful adaptation of Raphael's "Madonna di Loreto". To both of these types he brought his refined monumental classicism.