Smokey the Bear[?], mascot of the U.S. Forest Service, who insist that his correct name is Smokey Bear. No the. "Remember, only YOU can prevent forest fires." (He is also only semi-fictional, as he was based on a "real" Smokey Bear.)
Gladly, the Cross-Eyed Bear, a mondegreen created from the misheard lyrics of a hymn (Gladly, the Cross I'd bear. . .)
... negative implications, it merely designated anyone who assumed power for any period of time without a legitimate basis of authority.
The first to have the title ...