King Vitamin - The Blue Baron (1970)

Produced by Jay Ward Productions, From the later era of the King Vitamin commercials where he had glasses (a better look for the ruler if you ask me)
King Vitamin voiced by Joe Flynn
Sir Cravenleigh voiced by Bill Scott
and The Blue Baron voiced by Daws Butler
Video sourced from a episode of The Heckle and Jeckle Cartoon Show on a TheSixtiesGuy DVD that had bad clipping noises in the audio track, which is why I replaced it with an old TH-cam upload.