Edna St. Vincent Millay, first woman to receive the Pulitzer Prize for Poetry, produced poetry with a simplicity that eases you into its tangible emotions. Her life choices were not what I consider admirable, but her poetry is full of grace. You can read more about her here, in a brief biography.
God’s World
O world, I cannot hold thee close enough!
Thy winds, thy wide grey skies!
Thy mists that roll and rise!
Thy woods this autumn day, that ache and sag
And all but cry with colour! That gaunt crag
To crush! To lift the lean of that black bluff!
World, World, I cannot get thee close enough!
Long have I known a glory in it all,
But never knew I this;
Here such a passion is
As stretcheth me apart, — Lord, I do fear
Thou’st made the world too beautiful this year;
My soul is all but out of me, — let fall
No burning leaf; prithee, let no bird call.
She is best known for her poem Renascence; her poem The Suicide is more approachable (don’t be deterred by the title).