Sight pushers only work on dovetails, so how about the pusher that works on the most dovetail sight pistols. That narrows it down.
Most sight pushers are china imports from what I've seen. Some are specific to Glocks or 1911s. Some have spacer blocks that are modular within an O-shaped frame. Some have one screw with a pusher, some have two screws, some are cludgy push-pull systems. All of them work to a greater or lesser extent.
I bought this one for its adjustability. Haven't found a pistol it doesn't work with yet, unless it's not a dovetailed sight. It doesn't take much, and you could make one easily with machine tools. For years before, I simply used a non-marring punch and held the slide in padded vise jaws. No need for rocket science for a bang-the-rocks-together type of operation.