Also O for Oz with ABC Wednesday, Round 15:
Miss Piggy and Fozzie Bear on The Muppet Show. Cookie Monster, Bert, and Grover in Sesame Street. These were all creatures performed and co-created by Frank Oz, born Frank Richard Oznowicz. He has also performed Sam Eagle and Animal on the Muppet Show, and Yoda in the Star Wars movies.
Sesame Street, which I was too old to watch, but I did anyway; the various Muppet TV shows and movies; and the original Star Wars trilogy have brought me hours of joy.