Poetry / Any topic related to: Whitman, Dickinson, Yeats, Frost, Stevens, or Eliot [4]

My poetry professor didn't give us a specific essay topic to write about. He instead encouraged us to form our own essay topics. Unfortunately, I don't even know where to begin since I have troubles with poetry to begin with.

Could anyone give me an essay topic to write on? It has to be something I can talk about for about 4-6 pages and it should have something to do with any of the following poets: Whitman, Dickinson, Yeats, Frost, Stevens, or Eliot.

Please help me out.