I wanted to try this and spoke to a few people about it. What I was told it generally then need 6ft atlease between the pairs. So in theory, if each pair established their territory in each end it could work- but it’s not a for sure thing. If you do try I would add all 4 fish at the same time, otherwise the first pair may Become territorial of the whole tank. But be prepared to catch and Re-home the two of they start fighting.
I think there would be some aggression in the beginning and hopefully they figure it out, but if they start damaging and hurting each other then it’s time to remove two.
may also help if all 4 are juveniles and they will establish dominance.
I have three clowns in my tank. One big female and 2 males. They all get along fine. The first two are a long termed pair- 4-5 years old. The third one was one I took in an emergency for a friend, the smallest of the three, and I was hesitant to add him, but I think I got lucky and they all seem to get along fine. Although they all refuse to let any of the anemonies host them.