I have to agree with Teelie, the ones he crossed out most likely won't work.
However, of the ones left, I'm just going to add my thoughts on them.
Siamese fighter - Careful with Angels. Both Males and Females can get picked on by them. And also, no fin-nippers with these fish. They are very pretty fish, though, and look nice in a community tank, in my opinion.
Pearl gourami - Pretty peaceful fish, very striking. I find females to be slightly nicer.
Moonlight gourami - Pretty Peaceful, should work, however, I would pick either this one or the Pearl, not both.
Panda cory - Sensitive to water conditions, and more prone to bacterial infections, so sand and lots of water changes are needed. Very cute, and great schooler though.
Black Widow tetra - Never kept them, can't comment. Though they look nice in schools.
Rummy nose tetra - Great community fish, these would look very nice with the Angels in a nice, big, school.
Serpae tetra - Can be very nippy...so I would not reccommend keeping a Betta with these guys.
Cardinal tetra - Nice fish, very peaceful...a school of these would also look nice with the Angels.
Neon tetra - These are the Angel's natural food, so sometimes they can be killed by the Angels, or chased a lot. However, with some Angels it will work, especially if they are raised with Neons....kind of risky though.
Sailfin molly Nice fish, can be slightly aggressive, and they have MASSIVE amounts of fry...however, with the Angels, you should have some fry control. But just a warning...Sailfin Mollies come with lots of fry.
Guppy - Same thing, a big fry producer. Also, don't keep with nippy fish, as the male's tails can be picked on. Not sure how they and Angels get along.
Variable platy - Variatus Platy, I assume? Same as a regular Platy, gets bigger though. And once more, big fry producers.
Threadfin Rainbow - Cute little fish, nice schooler.
Lake Kutubu Rainbow - Never heard of them!
Zebra danio - Needs to be in groups of at least 6, more is better, and they can be nippy, so no Bettas or Guppies with them.
Pentazona barb - Nice Barb, not sure on the nippy-ness though.
Agassizi's dwarf cichlid - I know nothing...so perhaps ask in New World Cichlids, or wait for a person who knows about them to come along.
Ram cichlid - Good in pairs...can sometimes be aggressive with bottom dwellers...but they look very nice with Angels.
Just my thoughts, not sure how much they help!
I have a male and three female cockatoos in a 100 usg community tank, and they are much better neighbors than the serpaes. They pretty much keep to themselves. Maybe they will get crankier when they spawn, but I understand that they just guard the cave and look aggressive if anyone tries to come around. They are a bottom fish. I don't know about mixing them with angels or gourami, but mine are very compatible with cories.
