2 pairs of clown in same tank?

[ponokareefer]

What types of clownfish are the pairs? That can make a world of difference.
I tried a pair of true perc's and a pair of cinnamons. I worked until the cinammons outgrew the true perc's and then they wouldn't leave them alone until I removed the true perc's from the tank. Maroon clowns and tomatoe clowns are pretty aggressive as well.