"But One and not the Greatest"

[Angry Hill Troll]

Giving the Dwarves their due, Gandalf says the following in "The Quest of Erebor" in UT

Sauron could have done terrible harm in the North, while he defended Gondor, if King Brand and King Dáin had not stood in his path. When you think of the Great Battle of Pelennor, do not forget the Battle of Dale.