Putting two males together is the last thing you ever want to do - they'll deffinately kill each other.
Adding different species of gourami isn't going to improve the situation either - three-spots are one of the most aggressive and also get reasonably large - they'll attack other species if you add them now and they'll almost deffinately kill those new fish as well.
If you'd posted about adding another female on here and I'd replied, I'd have told you to add at least two more and to make shure you re-arange the tank just before and that the two new fish are the same size (or just larger) than the two you already have. New fish are viewed as 'intruders' by the territorial three-spots you already owned. Males are worse in this category than females and may go as far as to kill the newcomer (females may as well - but males are generaly more territorial). By adding just one, you also guarantee she'll get picked on regularly - if you add two or more, the aggression is at least split between them. Re-aranging the tank and buying same-sized fish evens out hierarchy/territory issues as the territory appears to be more neutral for the existing fish (because it looks 'new' to them) so they are less defensive and, as with most species, size often dictates hierarchy - the largest are most dominant - so having them all be the same size evens things out.
As things stand, you need to seperate the fish or return some. Personaly, unless you plan to breed (which can be hazardous, BTW, for even non-gourami tankmates as males become very aggressive by community standards), I'd find a new home for the male (or take him to your LFS) and buy a couple more female three-spots instead.
I'm not shure whether you realise this but gold, blue, opaline, cosby, lavender and platinum gouramies all belong to the same species (Trichogaster trichopterus) so any combination of colors is fine and you'd probably find that a group of females gets along quite well and that they'll even display something like schooling behaviour. You'll need at least a 30 gallon to pull off a group of 4 females though.
Just so you are aware - even keeping two females isn't the best idea as one will come to be dominant over the other (so removing just the male and not adding any is best avoided). The sort of aggression you'll see will be nothing compaired to the male's but it's still very stressful for the subordinate fish and may make her - and therefore the whole tank - prone to disease. By keeping a group, you ensure aggression is devided and the hierarchy is mroe complex - allowing all fish a respite from aggression and enabling them to be more social.
Your other option is, of course, to simply stick with just one of your three-spots (males do better alone than females but the decision here is more down to personal prefference).
that will be my last resoure. I am going to try and place him in a fry basket and separate him from the girls. 
