Frederic G. Melcher
Melcher proposed the Caldecott Medal in 1937 to honor children's picture books. Named for British illustrator Randolph Caldecott, the medal is presented annually for the "most distinguished picture book for children".
Chris Raschka
"Yo! Yes?" was a Caldecott Honor Book in 1994 but Raschka may be most famous for his "Hello, Goodbye Window", winner of the 2006 Caldecott Medal, and his book "A Ball for Daisy," which won the 2012 Caldecott Medal.