Great Dane -  the Apollo of dogs.

As described by the AKC The Great Dane combines, in its regal appearance, dignity, strength and elegance with great size and a powerful, well-formed, smoothly muscled body. It is one of the giant working breeds, but is unique in that its general conformation must be so well balanced that it never appears clumsy, and shall move with a long reach and powerful drive.  A Great Dane must be spirited, courageous, never timid; always friendly and dependable. This physical and mental combination is the characteristic which gives the Great Dane the majesty possessed by no other breed.