Hatty might be the best, but I'm not going to vote for her here since I'm voting for Ramesses in the 3rd group.
Pericles has great early game traits, but IMO his poor starting techs often prevent them from really shining. He's a very slow starter since in many cases neither of his starting techs are useful. You would think that cheap library + Philo would be amazing but the truth is that it just takes Pericles so long to get to Writing most of the time that this advantage is largely negated. Additionally, Fishing is actually quite detrimental to Pericles as he would otherwise be quite good for the Engineering bulb play.
Also, I don't really have much use for the Phalanx. I hear the argument "it has no counter" quite often, but it also has little purpose. It's still just an axe for purposes of attacking, nobody is going to pull off any Phalanx rushes at the top levels, and one spear or even some swordsmen in a stack can defend against chariots. I still think Pericles is pretty good, just not in the very top tier.
Louis XIV gets my vote here as he is my favorite leader without a power UU and there are no real power UUs in this group aside from Hatty whom I've already discounted since I'm voting for Ramesses in the next poll. Hannibal, Mansa, and Pacal would be my next choices behind Louis.