Leaders: Joshua, Solomon, Herod the Great, Hezekiah (in that order)
UU: Macabee
UB: Altar? (enhances happiness with State Religion buildings)
I know people like David (I'm rather partial to him myself), but I don't really think that he's a good leader choice for Civ. The guy spent a lot of time as a guerrilla fighter hiding from Saul, then he spent a lot of time being a successful organizer building up Jerusalem and preparing materials for his son to construct the temple, and in the middle of that, he spent more time as a guerrilla/refugee fleeing from his rogue son Absolam. Compared to the other choices, David is simply too well-rounded to use. Think of picking traits: spiritual, aggressive, organized, charismatic, and others apply. He's also only one generation removed from Solomon, who is another good choice, but why would you want two leaders next to each other in the timeline? I think that many of the same strengths David possessed can be found split evenly between Joshua and Solomon. Joshua was the military and spiritual leader, while Solomon was the scientific organizer. They're also seperated by enough time to give a larger breadth of Israelite history by including both.
Herod the Great, while being one of the less beloved leaders of history, really did a remarkable job and again, is rather distinctive from the other two both in style of rule and in time period. Hezekiah would also be a nice choice (gets a Protective and Spiritual in there).
The modern state could be added in I suppose as the political resurgance of the old Israel, but how many leaders do you really want? Even if you have up to three, Joshua, Solomon, and Herod give you a huge breadth of history: founding, height of power, and decline under Rome. The Macabee unit fills in the blank between Solomon and Herod with the uprising against the Greeks. I suppose adding a modern building for the UB could be used to include the modern period as well, but I really am not a fan of the modern secular Israel, so I could easily live without its inclusion.