While Gatsby is flawed, does he do noble things compared to others?

When we use the word "noble," we are referring to things that invite praise because they are based on high moral principles or positive personal principles.
For Gatsby, we see this clearly in chapter 9 when we learn about how he transformed himself into Jay Gatsby. His daily schedule from 1906, for example, shows that he dedicated himself to become physically fit, well educated, and free of unhealthy habits, like smoking. Despite his flaws, then, Gatsby's transformation was a noble one because it was based on high moral principles and a determination to better his life.
Similarly, we can describe his quest to be with Daisy as a noble one. Tom Buchanan, for instance, is only with Daisy because of her beauty. He does not really love her as a person and, in fact, demonstrates his disrespect for her in the story by keeping a mistress. In contrast, Gatsby seen as being truly in love with Daisy as a person and has dedicated his adult life to winning her back.