Ok, obviously, you couldn't put all of them in so here are my thoughts:
Dwarf gourami (pretty fish) or Pearl Gourami - pearl gouramies grow to be much more beautiful IMO and also have better characters. If, besides my opinion youw ant some fact, pearls are also hardier. The downside to pearls is that they grow larger (to about 5"). In a 25-30 gallon a male and 2 females would make lovely additions and would fill up the top layers somewhat. They are sometimes prone to being nipped because of their long fins and appreciate a tank with plenty of cover and peaceful tankmates. Otherwise they can be shy. Can learn to feed from your hand and is my favourite fish so I'm naturaly biased. Every tank should have its gourami!!!
Bloodfin tetra - Not my favourite tetra but an attractive little fish. It spedns most time in the upper areas of the tank so would clash with danios or gouramies. This isn't a terrible thing
Just emans you'll need to limmit their number. Being a schooling fish, you need at elast 6 and they get to about 1.5-2".
Cardinal tetra - Beautiful little tetra. Grows to about 2". Is often, unfortunately, quite delicate. Another schooling fish, as you know, so it'll need at elast 6 in the tank.
Zebra loach (character?) - Beautiful fish but can get nippy. Probably not the best fish to put in with long-finned tankmates but is generaly ok with top-dwelling fish as it spends most time on teh bottom. Surprisingly active consdiering it's meant to be nocturnal. You see this loach a lot mroe often that you do other loach species. Will eat snails. Grows to 3".
or Queen loach (a bit delicate?) - As in botia dario right? A social fish. They are active. I don't think they are delicate but other people may feel differently. They like to be in groups of about 5 but that pretty much fills up the bottom of a tank as they get to about 2.5". They become quite protective during feeding times but otherwise keep to themselves. Should also take snails.
Leopard danio or Hikari danio (good colouring) - Either would be lovely. They preffer the upper layers though so you have the same issue as with the bloodfins. The leopard especialy is icnredibly hardy and comes in a stunning long-fin variety. The leopard and zebra (same species, different names) danios are both common. Hikari may be a little mroe difficult to find. Keep in a gorup of at least 5.
Harlequin, lamb chop rasbora - The best schooling fish hands down. If you need to choose a schooling fish out of those in this list. This is the one. I'm not crazy about their markings or colors but their schooling behaviour is so tight they are an excellent addition. Peaceful and non-nippy as well and quite hardy.
Bristlenose catfish (will this be an algae clearer?) (Likely to get a baby one given to me) - Perfect pleco for a medium-sized tank. yes, it's a good algae eater and it doesn't grow larger than 6" (depedning on exact species). Is a messy fish and will hide most of the time but is an interesting, if not bizzarre, species and gets along with almost anything.
Featherfin catfish (fabby looking) - As in synodontis eupterus? A rather interesting and beautiful fish but, unfortunately, it grows relatively large and can be very aggressive - mostly towards other bottom-dwellers and to its own kind. Is not the best fish to keep with very small fish either. Probably best avoided in your case.
Panda cories (characters?) - Like any corydoras catfish, they are adorable and have great character; active, inquisitive and very social. Pandas in particular, however, are quite delicate. They need a mature tank. You are better off with one of the hardier species - bronze, blackfin, peppered or albino (usualy c. aenus color morph - same as the bronze cory). Also, check out the various color morphs for the bronze cory! They are an incredibly varied fish. I have eprsonaly had bad experiences with keeping cories with zebra loaches so I'd suggest you don't mix the two. Keep cories in groups of at least 4.
If you'd like my opinion of what you should get, assuming you get a 30 gallon, go for a school of 6 harlequin rasboras, a pair of pearl gouramies, 4 queen loaches, your 2 mollies and the platy. That should make a nciely balanced and active tank. None of the fish are too fragile either and they are all beautiful. Planting the tank would make it even more interesting, encourage natural behaviour and make all the fish come out more and be more active.
