A pair of Oscars and a Yellow Belly Bullhead are at the top of the list.
I'm also kicking around Clown Loaches, Silver Dollars (dithers), Pictus Cat, and also still open to ideas. I'd love to have my bank account recover some day and get a Tig !!!
I will get the Oscars around the 1.5 - 2 inch size so I'd love to establish a big school of Tiger Barbs and see if they can make it.
I know that fish eat fish so I'm not the type to get upset when I lose fish to some other fish's feeding frenzy. Many years ago I got a 2 inch oscar and a 2 inch Red Tail Shark. The RTS outlived the Oscar and "owned" that tank.