Ideas for an addition to 30 gallon non aggressive tank

[Phoenixphire55]

I have a 30 gallon long tank which houses several kinds of mollies, some cory catfish and two goldfish who will soon have their own larger tank with other goldfish. I'm trying to decide what cool fish I could get to replace the two goldfish. I'd only want one to three new fish to replace them, but I want something interesting, and not more mollies. I was thinking I could get some more corys (would two groups of different cory species fight?) or a pleco. Any other ideas?

[Purrbox]

Cories will get allong great together and will school together reguardless of species.

[JustOneMore20]

I suggest having atleast 5 of each species though, so bring your current number of Cories up to 5 before adding more.

Otherwise, you could have a pair of Honey Gouramis which would work nicely with your current stock.