I am making a thesis statement on this topic.

Jay Gatsby: Hero or Failure? Is Gatsby a heroic figure that can be idolized or is he a warning to the readers?
Would this be a good thesis statement?
While some people may view Gatsby as unsuccessful because of his tragic flaws, others believe he is victorious because he has logic, ideals and a dream.

It's not a thesis statement until it's clear what YOUR opinion (your stance) is.

While some people may view Gatsby as unsuccessful because of his tragic flaws, I believe he is victorious because he has logic, ideals, and a dream.

Aren't you not supposed to use "I" or "me" in essays? Am i supposed to get my opinion across a different way?

By examining how Gatsby has logic,ideals, and a dream, it is evident that he is a heroic figure.

Would this be a better thesis?

No, it's YOUR paper, and therefore if you write this, it'll be YOUR opinion:

Gatsby comes across as victorious because he has logic, ideals, and a dream.

If you add the contrast to "other people" and their view, put them in a separate sentence ... just before the thesis, probably.

I like your thesis better. I'll use that one. Thank you!

You're welcome!

When I hand in my thesis statement, is it supposed to be typed and in proper MLA format, or do I just write it down?

How is your teacher asking for it? By itself?

I usually asked for a thesis statement with the draft outline under it on the page.

In the paper itself, the thesis should show up at the END of the introduction.

Yes, he's asking for it by itself. Our ISU has 3 checkpoints

1)submission of thesis
2) Conference with teacher
3) Final draft
Does that mean i have to type it?

If you're not sure, then type it.