Do not add females to the tank.
Rams are monogamous so the pair [yes the male even with good chance] will chase and whip the other girls.
Other fish [dithers ] may work well to distract him but in general the male will run the show .
Raising ram fry is very difficult...Don't get hopes up on fry surviving without pulling them and raising them yourself properly.....
Yes adding cover will help her greatly.Aside from addicting dithers, would increasing cover / decreasing line of sight be helpful?
Yes, i definitely believe your planted tank offers the benefits of cover and concealment as well as broken lines of sight.
Very impressive. A lot of skill required for that one.