Stocking help for rio 180

[deano320]

Looking some help and ideas what to stock my rio 180 atm there is only 1 x angel fish
1 x redtail shark

I was thinking 1-2 more big fish and then maybe 1-2 schools of fish!! Open to ideas and suggestions

Tank has sand substrate, plenty of fake plants and a large piece of driftwood! I have attached a pic of my tank

Thanks

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[littlefish4]

Maybe a gourami? I have one with an angelfish and it's doing well. I hear it can coexist with sharks as well.