there's many, it's easier to figure out which fish you like the most and then study up on how well it breeds in tank. I've read of convicts being bred for feeders so there really is a wide spectrum. They are apparently easy because they have good nurturing instincts so they take care of their eggs.
If you are looking to breed fish to sell locally then just make a trip to the LFS in the area and see what they do and don't have, or just call them and ask them if/what they will buy.
i haven't breed anything but guppies and mollies so i don't think i could do angels any other ideas? i already have guppies,mollies,platies,a prego swordtail and some endlers so i want something that like livebearers are really easy to breed