Scooby Doo is a Great Dane. Look, someone got their Dane to look like Scooby: Other famous Great Danes are Marmaduke. and Astro, from the Jetsons. and Fang, the boarhound from Harry Potter (the books, not the movies).Scrappy Doo is a Great Dane too. Answers. Quora User, Pet owner and dog rescue volunteer. 4.3k Views • Quora User has 10+ answers in. Since the other answers don't mention it, the artist who designed Scooby-Doo for Hanna-Barbera, Iwao Takamoto, based his design on reference sketches provided him by a fellow HB employee who bred Great Danes.