Yes, a CF-7 (or GP-7, basically with the same wiring and equipment) with the teaser circuit working will move out real nice.
Jim asked about the NW-2. My understanding is that they typically were a little bit heavier than the later EMD switchers (again, typically), and that weight allowed for better starting and stopping of long cuts. Remember that weight relates to tractive effort, while horsepower gives you acceleration. The NW-2 apparently offered a nice balance of the two.
Another trick was for railroads to order SW-8s, 800 HP, but ballasted to 124 tons or so. The eight cylinder engine was easier on fuel than the twelve cylinder, and again the extra weight helped out in the TE department.