While the Pink Panther gave DePatie-Freleng its first legitimate hit series for NBC in 1969, Here Comes The Grump, co-produced by Mirisch Films, with whom DFE had previously produced Super President & Super Six, wasn't quite so fortunate. Grump was also part of the freshman class of '69, and was last seen in a brief run on the Sci Fi Channel (now SyFy) several years back.
The Grump (Rip Taylor) is a wizard who has placed a spell of gloom over a fantasy kingdom that looks more like something out of a Dr. Seuss book, which would be rather appropriate considering that DFE would later obtain a license to produce animated specials based on Seuss' books for CBS. Princess Dawn, the rightful heir to the throne, needs to locate the Crystal Key in the Cave of the Whispering Orchids. To that end, she recruits a young boy from the "real world", Terry (Jay North, ex-Dennis the Menace) as her partner. It helps them that Grump isn't exactly as menacing as he's made out to be. Then again, most comic villains aren't by design.
Here is the episode, "The Lemonade Sea":
Dawn's voice was done by Indira Stefanianna Christopherson, who was also the original voice for Daphne on Scooby-Doo, Where Are You?, which was the crown jewel of the '69-'70 freshman class. Now known as Indira Stefanianna, she left show business to get married, but has since resumed her career as both an actress and singer. One must imagine what might've happened if she hadn't left so soon.......!
Could Grump work today? I don't know, but it'd be worth a shot, depending on if anyone got a license....