South American Cichlids • Oscar tank possibly

[Welder]

Hi all

Intended originally for an Mbuna tank but now considering an Oscar and the possibility (opinions please) of either two firemouths or two severums or one of each??

I know there is a general split of the opinion of 4ft tanks not being big enough for an Oscar but this tank is 120 x 70 x 70 cm so not the norm dimensions. What are people's thoughts on having a single oscar with the possible tank mates mentioned?

Filter is going to be a 4ft sump tank. I appreciate high bioload so will be lots of filtration possible. Water changes are easier this way too.

Thanks