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.
Raphael
Raphael's compositions were always admired and studied, and became the cornerstone of the training of the Academies of art. His period of greatest influence was from the late 17th to late 19th centuries, when his perfect decorum and balance were greatly admired. He was seen as the best model for the history painting, regarded as the highest in the hierarchy of genres. Sir Joshua Reynolds in his "Discourses" praised his "simple, grave, and majestic dignity" and said he "stands in general foremost of the first [i.e., best] painters", especially for his frescoes (in which he included the "Raphael Cartoons"), whereas "Michael Angelo claims the next attention. He did not possess so many excellences as Raffaelle, but those he had were of the highest kind..." Echoing the sixteenth-century views above, Reynolds goes on to say of Raphael: