Yes, they all use the same basic wiring/activation scheme. Because some operating cars work with the uncouple button(using car chassis for ground/common) and some with the unload button(isolated from the car chassis), a DPDT (on)-off-(on) switch can be used to replace the bulky controllers. 6019 illustrated, RCS/UCS, GarGraves/Ross, RealTrax, FasTrack similar. If you really don't want the magnet energizing, just don't connect it or cut the connection. To use aux power, take the "power" wire off the center rail connection and connect it to your accessory voltage tap.
A DPST button type switch of your choosing can be used to energize either uncouple or unload by just using either the bottom, or top, respectively, of the DPDT in the illustration.
