Kermit the Frog, arguably Jim Henson's most famous Muppet creation, was the star and host of The Muppet Show, played a significant role on Sesame Street, and served as the logo of the Jim Henson Company. He continues to star in Muppet movies and make numerous TV appearances.
Scooter (Robot Chicken)
Constantine aka Worlds Dangerous Frog
Long John Silver