Centerpiece fish for 46

[Freddie]

Hi, im getting a new 46 bowfront & was looking for a centerpiece, my currently planned stock is

3 zebra danios
3 glow danios
6-8 tiger barbs
5 buenos aires
4-6 kuhli loaches
1 bnp or 4 ottos

So can anyone hav any ideas on a medium sized fish to get along with these? Also its going to be sand substrate with fake & live plants with live being n pots if it matters.

 

[Laser]

If it weren't for the tiger barbs I would say an angelfish. Perhaps a gourami of some sort. I'm a fan of the Pearl Gouramis, though mine are skittish even with floating plants.