Animals. Favourite album of all time, perfect from first note to last. Any band that can cap off a "fuck you" to Mary Whitehouse with an epic guitar solo is going places.
Other classic 1977 albums: Rumours (Fleetwood Mac), Peter Gabriel's first solo album, Going For The One (Yes), News of the World (Queen), Point Of Know Return (Kansas), Bat Out Of Hell (Meat Loaf), Seconds Out (Genesis), Songs From The Wood (Jethro Tull), and Heroes (David Bowie). Not a bad year.