Welcome to AA!
Do you know about the Nitrogen cycle? If not, I would recommend looking at this link:
The Aquarium Nitrogen Cycle
Lets go on to the stocking of the new tank:
I would leave the Clown loaches out. They can grow up to 12 inches and need to be in schools of 6 or more. <- That being said, they need 100+ gallon tanks to house them.
I would recommend only getting 1 DG (They are like bettas; they will fight with their own kind until one is remaining), but If you can provide enough hiding spots (and I mean a bunch) to keep the line of site minimum, go ahead and try it. Just in case, always make sure to have a back-up plan.
I would just keep the ADF's in the 10 gallon; Make it a species only tank. Why I say this is because they might have a hard time competing for food (Slow eaters.)
Stick with one cory school, It will make it easier to stock the tank with more fish.
I would leave the angels out if I were you..
Get rid of the Chinese algae eater, They will turn very aggressive when adult (Very territorial and sometimes sucks on to other fish).
Bring up the Schools of Barbs and tetras if you do decide to get them, they all do best in groups of 6 or more.
If you do decide to get the mystery snails, Make sure to have configuring algae or algae supply (Wafers) to make sure they all get something to eat.
So, To a conclusion, do you like this?:
6 emerald corydoras (bottom area)
2 Bumblebee catfish (bottom area)
6-10 black tetras (Middle to top area)
1 Dwarf gourami (All over)
6-10 cherry barbs (Middle to bottom area)
2 mystery snail (all over)
Just a recommendation when it comes to stocking fish, Only add 1-3 fish at a time (then wait 2 more weeks to add more every time). This is so that the bio-load can catch up to new load.