gouramis aren't saltwater fish skip them,as far as tangs inthe ocean they been sighted living in only 3 feet of water above coral reafs,other than that your plans look great i say go for it.
go ahead and add the pintail triger,true clowns tend to not be on other fish menue,lion fish is also a great suggestion if you have a reef,yellow tang would be more of a native fish for your selections of tank inhabitants.
true clown loaches,angels plecs do fine together,chillids tend to be more agressive fish than the others you mentioned& they love to nip at fish with long fins such as angelfish.sharks tend be verry carnivoruos&readily go after slow moving fish such as angels+it is also generaly a good idea to...
barbs are in both the tetra&chilid group,both barbs&tetras can get to be bullys if you have more than 2 or 3 of them&neon/cardnal tetras are verry fragile+high maitnance.Dainios tend to be great comunity fish due to their personality+if kept in schools of 6 or more theye tend to keep to them...