Show's credited producer was a guy, an ad agency exec, named Ed Graham Jr. (1928-2018).
He'd produced a number of shorts, then helped put the Post Cereals animals like Linus, Sugar Bear, Billy Bird, Lovable Truly, Rory Raccoon,and some toehrs on the map, though he didn't create them.
for more (the always JERRY BECK's obit)
.http://www.animationscoop.com/ed-graham-jr-1928-2018/
Best obit. I posted under the bottom under my real name. Sugar crisp, and alphe bits, and Crispy critters..Sheldon Leonard was wonderful as Linus..to quote an old Wizard of Oz review references in the late 1970s-80s guide MOVIES FOR KIDS about the Cowardly Lion, Bert Lahr:
Sheldon Leonard as Linus the Lion was f-ion.
Partner on THE DICK VAN DYKE SHOW, and creator, actort, and producer on that, CARL REINER, did voices for the other main characters in title segment, a guy named GERRY MATTHEWS who was 1960s club comic was Sugar Bear. The beloved JESSE WHITE was Claudis Crow, RUTH BUZZI and others were heard.
Graham also produced the shorts thjat JERRY refers to for Unviersal
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