This is not recommended. Both eels attain 3 feet in length and are predatory, eating smaller fish. Your cories will probably bee hunted, and I cannot say if the eels will be intelligent enough to understand the cory pectoral spine defense mechanism, but after they eat (or try to eat) one and the spine punctures the eel's throat, it will be game over anyway for both. And the nocturnal habits of the eels will stress your angelfish so they will be unhealthy.
Byron.
Byron.