No from what I know if you put 2 males of the same species in a tank you will probably end up with 1... you need at least 3 males in a tank so you could do 3 males of 1 species and 1 male of another with the relevant number of females but I wouldn't do 1,1,2 or 2,2 - 1,3 or 1,1,1,1 :)
Wills