Time for an upgrade 180 gal ideas.

I am upgrading my 75 gallon bottom feeder tank to a 180 gallon tank. The only fish I have in my 75 gallon are a 7" featherfin and a 18" pleco who is the main reason I'm upgrading. In my 180 I'm looking for ideas for some larger active fish that won't bother my catfish or any other catfish/bottom feeder species that won't bother them either. I don't want to get anything that will get too big or is super expensive/super hard to care for. One of my ideas was doing a cichlid tank or having oscars, would they be compatible with my featherfin and pleco? I am open to any ideas and really want to get some awesome fish.

Thanks for the input I think I'm going to get an ameiurus, and an ornate pim, I've seen both at my local store. I'm going to get the ameiurus and see how my other fish react to decide if I should get an ornate pim or not. For my active fish I was wondering if frontasa cichlids would get along with oscars and everybody else.

My local fish store has a 265 in the back with 5 big pleco some big oscars a huge featherfin and some knifefish so I think if I got an Oscar from them it wouldn't bother the pleco, I like the chocolate and chisel tooth cichlid, and am reading up on then now.