What fish for my tank ??

[MoMoMo]

Hi bros ! I have a new tank :150 cm * 50 cm * 60 cm which was installed last saturday (about one week) so how many time would i wait before putting a fish in this tank and what fish can live in this tank ( i would want only one big carnivorous fish in this tank ) .
Thanks for your answers .

 

[Loubard]

I have a tank the same size and keep a Datnioid (13") and a Panaque (15") in there.