Border Collies are intellegent. They will learn fast. They also are very athletic and need to be socialized and given exercise.
Golden Retrievers, while dogs are all known to be empathetic are known to be more so then others. As well as that they are often called the sweetest breed
While these dogs keep to themselves a lot they also are sweet and smart. Beware, Tibetan Terriers t will try and train you, instead of the other way around.