Tiger datnoide and spotted gar are good pets, although you would have to re home your gar after a couple of years.
Tangledupincichlids in Cichlids have them in stock. I would personally talk to Jeff Rapps about them first.May want to check this specie of Piranha https://www.monsterfishkeepers.com/forums/threads/pristobrycon-denticulatus-piranha.556077/
Yep, exodons may bother the wimples from time to time, so have plenty of visiual barriersI can do wimple AND exodon together with a lima??
Wimples do that in nature, but quickly stop in aquariums (provided you get a younger wimple)Lima is a good choice, could have more than one too. If you want a bit of action from a medium sized good looking catfish, see if you can get hold of a "bolt catfish" , aguarunichthys torosus, make great pets, can be hand fed and are active, especially if you put a powerhead front to back with air intake, they love it.
Think you need to look at the wimple piranha idea, from the little i know of them they survive by eating fins and scales off other fish - I could be wrong but I think deadliestviper7 is talking about leaving out the lima not keeping them all together.