Although more peaceful than most cichlids when it comes to restocking it may be best add a few more rams to prevent the other tank inhabitants from becoming the target of any territorial aggression. Firstly though I'd try to work out why the whitespot outbreak caused such a huge problem in your tank as it is a fairly easily treated parasitic infection. Getting to the bottom of this is far more important to try and prevent the same scenario from happening again.
How big a tank? How long had it been set up? How many fish were in it and how soon were they added? Had you changed anything recently? Water readings.... anything to help someone advise you.
Your tank is only big enough for a single pair of Rams. As GBR and EBR are the same species then if one is male and the other female leave them as they are. If they are both the same sex, watch out for aggression (especially if two males) and if necessary rehome one of them.
Firstly though I'd try to work out why the whitespot outbreak caused such a huge problem in your tank as it is a fairly easily treated parasitic infection
In my opinion, it's best to keep cichlids in a group or get a mated pair if you have a minimum volume for the fish. Most soft water cichlids are pair fish, having 2 same sex specie in a minimum tank might cause lots of aggression once they're mature. 1 male might dominate a small tank and give the other one stress.