Puff the Magic Dragon: The Incredible Mr. Nobody

Oliver Burgess Meredith (November 16, 1907 – September 9, 1997), known professionally as Burgess Meredith, was an American actor in theatre, film, and television, who also worked as a director. Active for more than six decades, Meredith has been called "a virtuosic actor" who was "one of the most accomplished actors of the century." Meredith won several Emmys and was nominated for Academy Awards. Description above from the Wikipedia article Burgess Meredith, licensed under CC-BY-SA, full list of contributors on Wikipedia

Robert John Holthaus (December 28, 1928 – August 2, 1985), better known as Bob Holt, was an American actor, best known for his voice work. Holt's first film role came in 1950, acting as Octavius Caesar in Julius Caesar. His career as a voice artist began with the 1968 short film Johnny Learns His Manners, for which he provided all of the voices. He later appeared in such works as Bedknobs and Broomsticks, several animated television specials with Dr. Seuss, for example, The Lorax (1972), Dr. Seuss on the Loose (1973), The Hoober-Bloob Highway (1975) and The Grinch Grinches the Cat in the Hat (1982) and the animated film version of Charlotte's Web as Homer Zuckerman. Holt appeared in a variety of different works, including animated films for both adults (the 1974 sequel The Nine Lives of Fritz the Cat) and for children, as well as voice and acting work in live-action films (for the blaxploitation film Abby, Holt provided the voice of the Demon). In 1975, he was the voice of Grape Ape on The New Tom and Jerry Show. The same year, Holt provided the voice of Avatar in Ralph Bakshi's film Wizards. Avatar's voice was an imitation of actor Peter Falk. In 1982, Bob Holt played the title role in Marvel Productions' animated The Incredible Hulk (1982 TV series), also in the process creating a library of stock roars that would be used for many years afterwards.

Billy Jayne (born April 10, 1969) is an American actor, musician, and director. He has been in many films, and has sometimes been credited as Billy Jacoby. His siblings, Scott Jacoby, Robert Jayne, Susan Jayne and Laura Jacoby, are also actors. Description above from the Wikipedia article Billy Jayne, licensed under CC-BY-SA, full list of contributors on Wikipedia.

​From Wikipedia, the free encyclopedia.   Harold John "Hal" Smith (August 24, 1916 – January 28, 1994) was an American character actor and voice actor. Smith is best known as Otis Campbell, the town drunk on The Andy Griffith Show, and was the voice of many characters on various animated cartoon shorts. He is also known to radio listeners as John Avery Whittaker on Adventures in Odyssey. Smith is often wrongly given credit for the writing of the movie It Came from Beneath the Sea, as well as ten other produced feature films. The true co-writer of those movies is Harold Jacob Smith, who wrote as "Hal Smith" until 1958. Description above from the Wikipedia article Hal Smith (actor),  licensed under CC-BY-SA, full list of contributors on Wikipedia.

Robert Ridgely (December 24, 1931 – February 8, 1997) was an American actor, known for both on-camera roles and extensive voice-over work.