Well, if your focus is on Frontosa, and blue ones, your looking for the zaire group, the moba, kampampa, mpimbwe... there is actually a mpimbwe breeder with some great looking fry very cheap on the site... let me know if you want his info..... and as far as what other stuff can be mixed in there..... I would not go with tropheus..... they are waaaay to aggressive for the gentle giant... maybe some calvus, and bichardi, but the bichardi are small... could end up lunch... lol... anyway, let me know when your ready to get started, Id be glad to help ya out.
Joe