>>17759909 (OP)head on, hand to hand only? probably classic hoplites, considering they had very good face, body and shin protection, and they held their spears over their shields, effectively aiming for the face. of course this is if you have like, 100 vs 100 total war unit v unit style.
although, of course, romans all had javelins from around the samnite wars onward (early on it wasn't the pilum, that was most likely borrowed from the iberians during the punic wars). and around then, the greeks had also started fighting similarly to romans with their theurophoroi.
you really have to specify the time period and the origin of the soldier. if a roman citizen soldier, is it from the manipular legion, or the late roman one? is it from the early manipular, which wasn't the same as the later maniples. is it a hastatus, princeps, or triarius? or maybe he is an italian ally, such as the samnites, who were more martial and rural in their culture? just saying one type of soldier with a long history and another one with a long running history won't suffice.