I wouldn't personally...
Firstly, angels are better kept in pairs, so, for the reason stated by aiwenbettas, they do not make good tankmates for other territorial fish.
Secondly, the problem is even more pronounced in fish as prone to stress-related illness as dwarf gouramies.
Also, gouramies compete for space with gouramies as most species occupy the same layers.
Finally, 29 gallons really is only just large enough for any angelfish.
Still, it's possible - what species of gourami, what other fish and how many angels?