None of these are Grasshopper Sparrows. 2 and 4 clearly show streaking on the breast, absent in Grasshopper Sparrow, and the second picture of number 3 clearly shows a Clay-colored Sparrow. The lack of grayish lores and auriculars and heavy bill rule out Le Conte's for 2 and 4, and the yellowish supercilium (and yellow-greenish face) is consistent with Henslow's Sparrow, which is what 2 and 4 are.
So, to recap:
1. Sedge Wren
2. Henslow's Sparrow
3. Clay-colored Sparrow
4. Henslow's Sparrow.