Which fish should be my center piece?

[BALLER34IG]

My stock list is as follows.

3 bichirs (2 senegals and 1 palmas)
1 angel fish
1 turquoise severum
1 gold severum to be added after it grows a little
1 ropefish

Or do you have an idea of another fish that could be the centerpiece?

 

[Angler]

Tank size?

 

[BALLER34IG]

75 but i have a 125 that can be set up when i get the room. All fish are still very small. the bottom level of the tank is fine as far as the bichirs but the upper level lacks fish.