High is a generally one of great battles between clear cut good and clear cut evil. A small select band of otherwise ordinary folks have to save the world against a might evil. This is not a genre a read a lot of. I don't particularly believe in such great evil for the sake of being evil.
Probably the best known example of high fantasy is JRR Tolkien's Lord of the Rings series. Other examples are listed below:
The Chronicles of Thomas Covenant
I read the first trilogy in high school and loved it. After that, I dont' know.