Is this a good 29 gallon aquarium stocking?

I think you're good on your numbers as long as you watch your feeding, filtration, and maintenance, but I wouldn't try keeping the paradise with the opaline gourami - both species have the tendency to be territorial, so I would choose either the pair of opals or the paradise and leave it at that. Be sure to include some plants and other hiding areas since eith of the gourami types may show some aggression to the tankmates (especially if the opals spawn).