with all those fish, here is how i would break things up....
1. the RTS needs a 55 IMO if you want to keep him with other fish, but as they can be very aggressive i'm not sure what fish would work, someone else will probably have a suggestion. by himself you might be able to go a little smaller, but i dont know about that
2. the columbian shark needs its own tank because it's brackish, 55 gallons at a minimum
3. you can probably do a 29 gallon with six tiger barbs and four or five kuhlie loaches.
4. you'll need a 75 gallon and three or four more yoyo loaches for them to be happy. they can hold their own with slightly aggressive fish. you can probably put your gourami in here too.
5. the clown loaches......125 gallon, absolute minimum, 180 would be better, at least 6 feet x 2 feet x 2 feet.
http://www.angelfire.com/ab7/moreitwork/clownloach.html this site says you can keep barbs, gouramis, livebearers, rainbowfish, etc.