Fish That Feed Form The Top Of The Tank?

[lifeofbrian]

Looking for fish that eat from the top or surface of the tank. I used to have a blur Gourami that did a good job of eating all the excess surface flakes, but what other fish compatible with Corys and Teras are there?

 

[LyraGuppi]

Killifish, gouramis and bettas, and most livebearers have upturned mouths, but I've only owned bettas and livebearers so I couldn't say much about the others.