Hi there welcome to the forum, I'm afraid that your stocking stands a good chance of not working out in the long run, you have too many cichlids in there for that size of tank - Idealy in a 30 gallon tank you want 1 pair of medium sized cichlids by which I mean your Kribs and then build a community around them with things like tetras, cories or various other not cichlid community fish. OR you could have 2 pairs of dwarf cichlids like the bolivians you have.
With the American Butterflies - I am unsure of what these are but there are 2 african species that are sometimes termed as these do yours look like either of these?
http/www.aquahobby.com/gallery/e_pantodon.php - african butterfly fish
http/www.aquaticcommunity.com/cichlid/butterfly.php - african butterfly cichlid
alternativley it is also a "common" name for normal blue rams like this -
http/www.aquahobby.com/gallery/e_German_...us_ramirezi.php
The other issue is the clown loaches - these grow very big to around 10-12 inches though admittedly they are slow growers but they do still need a big tank eventually around 120 gallons they also like to be in groups of about 5 as do other loaches - have you seen any of the others that stay smaller? There are a few that are quite suited to your tank like zebra loaches or dwarf chain loaches
Good to see you have bristlenoses as opposed to common plecs the bristlenoses will get to around 4 inches and are a good fish for your tank. When you say a few how many is that ideally your tank would be able to cope with 2 as they are messy fish and poop a lot. I think realistically you are going to have to rehome some of your fish
Think if it was me I would stock either
1 Pair of Kribs (1 Male 1 Female) 2 Bristlenoses and then add in a few more fish more suited for your tank maybe something like a tetra school, some hatchets, smaller loaches like the pygmi chain sword or zebra loaches.
or depending on gender of the fish and also the species of the "butterfly cichlid"
3 - Bolivian rams (1 Male 2 Female), 3 Butterfly cichlids (if these are rams) (1 Male 2 Female) and 2 BN's then again maybe add some tetras or smaller loaches.
Hope thats some help for you, sorry to be the bearer of bad news about having to rehome some fish but the stocking at the moment will run into big problems eventually. Wills