If you really want a large pretty fish. Go with "one" such as the Severum. That is what I have as a centerpiece fish. Then you could add a school of some sort, a plec, and some loaches. Maybe a smaller shark of some sort or one medium sized fish that will not eat your school and get along with the severum.
I like that idea, and that is basically what I am doing, |I will have a school of 6 boesemans. but the medium sized fish to go with the centre piece. idk. maybe a gold severum as the centrepiece and a festivum or firemouth cichlid. god im really stumped, dont know what combo to go for. I have got plenty of time, but want to get this decided soon;/