can oscars get along with dicus,or turtles,paroon sharks,ram chiclids,parrot fish,frontosa,flowerhorns,black ghost knifes,and can a oscar live with a aro. or any other tank mates that are sutible for my oscar.

Not sure if I would put them with discus as discus do require pristine water conditions, these fish are best kept with their own, or with non-aggressive fish.

You shouldn't mix tropical fish with turtles, turtles require their own environment. They are also quite messy so you might have a problem with water conditions if With Oscars as well.

I would suggest researching the other fish you have mentioned that some of them do get very big, or too small and get aggressive in their own right.

x2 .........

DO NOT MIX DISCUS WITH OSCARS under any circumstances. Discus require very very clean water and that will be difficult with an oscar. Also discus are too delicate and wont last long if your oscar bullies them a little. If you put an oscar with discus you will end up with dead discus.

turtles dont mix with oscars because of nipping and flowerhorn are too aggressive. Rams dont generally get big enough and will get eaten.

Frontosa will be ok

I dont know about the rest