I have 4 tiger barbs.... Interestingly...they get along and school with my red minor tetras and cherry brabs -- it looks pretty cool ....
and they leave the angels and mollies alone... In fact the 2 black mollies and 2 dalmation mollies are always playing with each other -- and the tiger barbs ignore the mollies as well as the angel fish.. I was actually surprised after reading how agressive they are........I would assume they just have good personalities.....
the angel fish are growing fast.... so I dunno how long I could kep my current stock... and the three angels play with each other....fun to watch... I dunno what makes my fish seem happy.... but they really do seem to like there home.... I wish they would stay the size they are now cuz i am really happy with how the tank is ......sigh ... oh well ...we'll see how it pans out as they grow...sorry didnt mean to go off topic .....
bottom line is I dont have any problems with my 4 tiger tetras and mollies......Just my experience -- maybe i am lucky

the angel fish are growing fast.... so I dunno how long I could kep my current stock... and the three angels play with each other....fun to watch... I dunno what makes my fish seem happy.... but they really do seem to like there home.... I wish they would stay the size they are now cuz i am really happy with how the tank is ......sigh ... oh well ...we'll see how it pans out as they grow...sorry didnt mean to go off topic .....
bottom line is I dont have any problems with my 4 tiger tetras and mollies......Just my experience -- maybe i am lucky