While I like paradisefish a lot, do research them a bit before buying. Male paradisefish are famously aggressive towards each other, so keep only one male per tank. Paradisefish are also surprisingly predatory and will eat things like neons. Mixing them with something placid and slow moving, like angelfish, would also a pretty bad idea, because they are territorial and will chase things that don't get out of the way. Best kept with armoured catfish, Corydoras, large/giant danios, non-nippy barbs, etc.
Paradisefish are also *subtropical* fish, and under very warm conditions lifespan is reduced. Consider 25 C the maximum, and anything between 18-24 C the ideal. Under subtropical conditions, you can easily mix with subtropical fish like weather loaches, Corydoras paleatus, Scleromystax barbatus, rosy barbs, etc.
Cheers, Neale