Archimedes, well, I would like to discuss maths and engineering with him, because he did many amazing things, while the amount of available information and knowledge to build on was low. I am also curious, if he really constructed his famous "solarbeam" weapon.

And perhaps some philosopher, but I just found out, that I can't recall any famous philosopher from EB timeframe.
There are also many other possibilities, even not famous people, but even some random citizen of Rome/ random Celtic druid...