Have you personally had trouble with these fish not getting along?
Not personally no. I was thinking about doing a similar stocking on my 45.
http://www.aquariacentral.com/forums/showthread.php?t=222093&page=4 (Scroll down to see the part about the gouami angel combo)
So it could definetely work, but it all depends on the personalities of your angels and gouramis.
