The Romans fought loose order with chopping swings, not shoulder to shoulder, at least until they adopted a more spear centered infantry line in the later empire. They didn't fight like the vikings, or a phalangite.
The Greek style of warfare pre phalangite was also incredibly chaotic and not given to formations. The Spartans may be an exception, in that they at least learned how to march in formation, which was beyond your average greek hoplite, but it's not entirely known how sophisticated their actual battlefield formations would be. Even a basic level of discipline and training would put them head and shoulders above how most greeks fought.
so wha kind o sources ye have to back yer claims, i would love to read em as most historians and sources seem to be wrong in the roman and greek warfare according to yer claims. and wha does the pre phalangite have to do with this? i said think o the spartans, and most medieval warfare where just this, phalanxes fighting each others or shieldwalls pushing each others untill one routed.