Depending on what your teacher is looking for, you have to understand that your essay will hinge on this statement. Everything within the essay will have to relate to it, so pick one that you know you can support.
Here are few additional ideas you can add to your list:
- F. Scott Fitzgerald's The Great Gatsby uses the literary device characterization to demonstrate values of the 1920s. (You could then write about 3 characters modeling a value like materialism or self-gratification)
- Characterization throughout The Great Gatsby takes place in the form of static, dynamic and foil characters. (Then write a paragraph about each as depicted through a specific character for each one)
- F. Scott Fitzgerald develops his characters through the eyes of Nick Carraway, an unreliable narrator.
A thesis statement for any essay depends on what you want to say. Therefore, I can only guestimate or throw out some topics and statements for you to consider, without any idea whether or not they're what you're looking for. Some possible thesis statements are:
- Characterization of Daisy reveals that Gatsby's view of their relationship was always an illusion.
- Nick's characterization of Tom and Jordan demonstrates that he is an unreliable narrator.
- Characterization of Meyer Wolfsheim is stereotypical and reveals anti-semitism on the part of Fitzgerald.
- Characterization of Daisy reveals her to be more than just a wicked rich girl who enjoys toying with others' lives.
- Characterization of Gatsby in chapter three demonstrates him to be polite, considerate, and a bit shy.
I don't know if any of the above will help, but they should provide you with some samples.