I'll post a modest bet on Gray Cheeked Thrush for the following reasons: the light eye ring is present but not sharply defined like Hermit nor buff like a swainsons. Also, no buff stripe emerging ahead of the bill as on Swainson's. And according to my field guide, Eastern Hermits appear to have a lighter bill.
Many Thrushes are hard to differentiate as breeding adults, and this is a juvenile, so who knows? Hermit, GC, and Swainson's are common summer breeders here and are easily heard but rarely seen. A welcome sound of late spring. I agree that # 2 is a Fox sparrow.