Most quality autopistols can be effectively operated one-handed/right-handed with a only a little practice; I see no real need to limit yourself to a specific model, unless that is your preference. Adding extended versions of some pistol controls (such as the slide release and magazine catch) might be helpful for one-handed operation. I'm a big Glock fan, and I shoot them one-handed fairly regularly, both to practice for competitions and to keep my one-handed (injured shooter) defensive skills sharp.
Many years ago, I knew a dedicated bulls-eye pistol shooter (NRA Standard Pistol competitor) who had a physical challenge similar to yours. After he recovered from the accident, he wanted to continue shooting, and so he designed and built (with the help of several shooting buddies) a custom "shooting station" that would assist him in manipulating the pistol for loading, unloading, and even clearing stoppages/malfunctions. Using something similar, you should be able to target-shoot just about any handgun(s) you'd like.
The basic requirements are a "cocking assist" block to aid in moving the slide to the rear during cocking/loading and unloading; a place to secure a magazine so you can fill it with ammunition; and a spot to hold the pistol with it securely pointing in a safe/downrange direction during sight adjustments, breaks in shooting, inserting a magazine, etc. In his case, most everything was made of wood, and attached to a board which was C-clamped to the benchtop at his shooting position. He had an angled block with a countersunk hole in the face, so he could align the front of the slide with the hole and press down, and the slide would be pushed to the rear for loading, unloading, and locking the slide back. He used a modified clamp to hold magazines during loading, and had a dedicated "tray" for loaded mags as well as ones waiting to be filled.
If you're interested in something like that, give me a few weeks, and I'll work up a prototype using one of my Glocks, and take a quick video clip of it being used at the range.