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.
Vertner Woodson Tandy
Tandy's most famous commission was probably "Villa Lewaro", the mansion of Harlem millionairess Madam C. J. Walker, in Irvington on Hudson, New York. Among his other extant work are the Ivey Delph Apartments, and St. Philip's Episcopal Church at 204 West 134th Street in Harlem, through his architectural firm of Tandy & Foster. The Ivey Delph Apartments, designed in 1948, was listed on the National Register of Historic Places in 2005.