I very much like the idea of getting your Ram 3 girlfriends. No logical reason why it would be good for the fish, I just like the sound of it.
My initial response in this thread I mentioned that it seems and is said often long finned fish are somewhat more delicate than regular ones. Wells Rams seem delicate to begin with. So it doesn't surprise me (although it still sucks!) that one of yours died. Getting him a female (or two or three) and even adding an additional pair (or threesome or foursome) would give your current Ram 'something to do' to prevent him from getting bored and chasing the smaller fish. Since the smaller fish are too big to eat, yet not a threat, they probably will be far less interesting than matable (is that a word?) females or a competitive male. Also when you buy the new Rams it may be best that your new male (if you get one) is slightly smaller than your long finned. Long finned fish tend to be slightly less aggressive so you want them to be close to equal in aggressiveness / strength. Not to mention any fish established as the ruler of a tank may take it hard getting bumped down to number two.
Personally I think 3 females and one male slightly (less than a half inch) smaller male would be the perfect Ram community. May even want to consider getting different kinds of Rams (i.e. Blue, Bolivian, German). If you do this, to prevent interracial relationships (not that that’s bad, I’m white and my girlfriend is Cuban) put the female in the 120 with the long finned that you want to 'hook up' with him (or two females... or three!) and then put the other two+ Rams you want to 'hook up' in the 29 gallon and let them all 'get familiar' with each other. Once bonds have been established (shouldn't take but a week, two at the most. If it doesn't happen in 2 weeks it probably won't) they can all be put in the 120 Gal and the bonds will not only survive the aquarium transfer but will most likely make it easier on the fish (mostly because the long finned Ram will be quite preoccupied with his female(s). Will make the opportune for one or two small harsh battles but if you create inviting environments on opposite sides of the aquarium they will probably spend most of their time flirting with their females and making arrangements for mating.)
(please forgive the paragraph long inserts in parenthesis but my mind seems to wonder even while contemplating a point so the grammatical flow tends to be disrupted (hey look! A quarter!))