I believe all wreckers have front winches. I may be wrong, but I can't remember seeing one without a winch.
In order of size:
XM711, Truck, wrecker, light, 3/4-ton, 4x4 (M37 chassis), very rare
M60 Truck, wrecker, light, 2 1/2-ton, 6X6, (M35 chassis), very rare
M108 Truck, wrecker-crane...