33 gal fish tank what fish can go with mollies?

I have a 33 gallon long fish tank that has no fish in it. I want to get black mollies but I want more than that. Im thinking of getting 3 black mollies (2f and 1m) but have no clue what else to get. I was thinking of cory catfish but after doing research I found contradictions about puting mollies in with cory cats because mollies like salt water. This tank will be freshwater with a couple teaspoons of aquarium salt. So what fish can go with black mollies (my heart is set on 3 black mollies) but I want more fish then just mollies.