He's not.
One expression describing a person who pretends to be morally better than he really is is "a whited sepulchre".
A person who is very generous and morally good can be described as altruistic or philanthropic.
Superman
A person is morally bankrupt if his actions display a complete disregard for ethical values or principles.
A puritan.
No, Nick was the only person who attended Gatsby's funeral in "The Great Gatsby" by F. Scott Fitzgerald. Daisy did not come to the funeral, showing her lack of real connection or commitment to Gatsby.
The book that Gatsby's father shows Nick is important because it reveals Gatsby's aspirations and determination to better himself. It highlights his motivation for success and the lengths he was willing to go to in order to achieve his goals, providing insight into Gatsby's character and his relentless pursuit of the American Dream.
A virtuous person is someone who consistently demonstrates qualities such as honesty, integrity, kindness, and compassion in their thoughts, words, and actions. They strive to do what is morally right and are guided by principles of goodness and excellence.
The Great Gatsby is told from a first person point of view. We read the story through the eyes of Nick Carraway.
The phrase is morally defective. It means a person who has totally lost his or her sense of right and wrong. (Alternate phrase: morally bankrupt)
Nick spends most of his time with Gatsby himself at Gatsby's parties and events. Although he interacts with other guests and acquaintances, Gatsby is the primary person he interacts with and observes closely.
The Great Gatsby