I just want to make sure of something about swordtails, can someone help?

I am getting 3 swordtails for my 20 gal planted tank with a lid and I am going to petco and getting the one that is the best looking. And I just wanted to make sure that EVERY kind of sword tail is a good peaceful addition to my community tank with red wag platties, male dwarf gourami, ghost shrimp. And mAybe neon or glolite tetras in the future!? Is their any that are agressive? Any that you recamend?