1,2,3,and 7 are Savannah. Tricky angles for some of the, but the crisp streaking, clean white breast coloration, thinner malar stripe and short tail are good marks for Savannah. 4,5,6 are Lincoln's, with the very thin streaking, buffier chest contrasting with white belly and also a very thing malar stripe.
Call is often a better way to ID tricky sparrows. It takes some practice to get down, but Lincoln's have a pretty distinct call that gives them away from Song Sparrows, often before you even see them.