Could i keep a mbuna cichlid with a tiger oscar?

Question

if not what could i put with him?

Answer 1

No. Mbunas and Oscars need entirely different water conditions and it would be a big personality clash.

What fish do you have already, or "him", some mbuna or the Oscar? Mbunas can only be kept with Mbunas, sometimes with some robust catfish, but mostly only other Mbunas. Oscars do not play well with others and are much happier alone.