A few interesting sleeper candidates from smaller schools:
1) Seth Littrell, North Texas HC. Won 5, 9, and now 7-2 so far this year. Former OC at UNC when their offense was actually good, and also an OC at Indiana and Arizona. Only 40 years old. Coached under Leach for like three years at Texas Tech so he's been influenced by that school of offense.
2) Scott Satterfield, Appalachian State. Since they transferred from FCS to the Sun Belt he's won 7, 11, 10, 9, and 6-2 thus far this year (took Penn State to the wire in week 1). Plus he employs Ponce (OC) and the underrated Shane Clark as OL coach.
3) Seen him brought up here before, but I like Neal Brown at Troy a lot. Only 38 and won 4, 10, 11, and 7-2 so far this year.