What I would do is keep the majority of the space as a walk-through aviary, and have separate aviaries for any species that wouldn't work well with smaller birds. So this is where the toucans, aracaris and macaws could go. If they are available it would be cool to have hummingbirds in a separate aviary too, but I doubt it.
For the walk-through:
Ringed Teal, Rosybill, Sunbittern, Wattled Jacana, Crested Quail-dove, Green-cheeked Conure, Hawk-headed Parrot, Guira Cuckoo, White-tailed Trogon, Blue-crowned Motmot, Spangled Cotinga, Screaming Piha (probably unlikely), Troupial, oropendola and/or cacique sp. (might be better if they were separate), various tanagers, honeycreepers, finches and cardinals.
Most of those are pretty common in zoos. Of course this would have a pond area for the waterbirds.
That's just my personal idea, it may be too many species though depending on how many tanagers and related birds are included and what is available.