Frankly, Buttercup's right. All of the hitches on the market will move your trailer down the road. And this has been hashed over a bazillion times. What is generally not understood very well, particularly by novice tow-ers is what sway is and isn't.
Sway isn't inherent in a trailer, unless the trailer has some design flaw or severe axle maintenance issue. Sway IS an induced condition, has a variety of causes, and IS preventable. Trailers that tow perfectly behind one tow vehicle may be a white knuckle ride behind another.
The causes of sway are typically low tire pressures in either the tow vehicle, trailer or both; improper loading of the trailer causing the tongue weight to be less than the normal 10-15%; engineering shortcomings in the design of the tow vehicle that allows for "rear axle steering" when the rear axle doesn't stay centered under the tow vehicle under load; and deficiencies in the hitch setup where the trailer isn't towed level and the tongue is either high or low (again affecting effective tongue weight).
The effects of sway on the tow vehicle are magnified with short-wheelbase, light weight tow vehicles, and are minimized with long-wheelbase, heavy tow vehicles.
Once all of those issues are corrected there should be no inherent sway in a trailer/tow vehicle combo. THEN it's appropriate to look at which sway control/hitch setup works best for you.
Sway control applied to a hitch system before the problems are resolved merely masks the problems until the problems become so severe that they overcome your sway control system. That sets you up for a crash, essentially without warning. Sway control should be "in addition to" as an added safety factor rather than "instead of" figuring out and fixing why you have sway.
Here's another current thread on sway and hitches: