I have an angel and a dwarf gourami.. they are perfectly fine.. the aggression u saw in the past isnt unheard of tho,, they are peaceful fish but will stand their ground and the guy at my lfs was tellin me about his keepin aggressive fish that are 10 inches in size in order, i havent expierenced that with mine but i have had him keep other fish such as an opaline gourami or sharks in line. As said by the others he ignores or just plainly swims next to the angelfish, they are quite the pair as they both tend to stay around eachother in the same corner of the tank at times.. O and i find dwarf gourami, angel and sevrums all seem to be best friends in my tank.