I wouldn't put green sunfish with my Oscars, as I care for them.
I have my farm pond overrun with green sunnies, and I put two in with my red belly piranhas for food. They beat the living tar out of my RBP's, but at least taught them to take non-live tilapia chunk.
The Green Sunfish also beat the snot out of Dovi, Jaguar and Poleni well over twice their size.
I have two to three inch mean greens in with a foot long stary night, 9" pike cichlid and school of full grown 5" hybrid turquoise x red Jewel cichlids and they are still fearless!
I have had tremendous success with native Bowfin with my lemon, red and Tiger Oscars however!
How long have you had these configurations.....Ive seen Jewel cichlids take out much larger and meaner fish, Im a big fan of N/A natives and sunfish in Particular and know that Greens, Redbreasts and Dollars can be aggressive.....but I wouldn't dare put in any sunfish with Jewel, Dovi, Jaguar and Pike cichlids and expect them to live; that's nothing short of a miracle imho.