And where on earth is Tidus in all this? Tidus is just Zidane without the mental breakdown when he finds out about himself. In fact, he just got up and smiled and kept going and bottled it inside. By your standards, Tidus > Zidane. Although Yuna was the leader and not Tidus in my opinion anyway.
Well, no one really likes Tidus. So saying Zidane > Tidus would hardly cause any interest while Cloud and Squall have a large fanbase. Oh and please do not insult Zidane. He is nothing like Tidus. Tidus leaned over and sniffed his companion, hates his father because he misses him and he whined. Over and over and over and over. Zidane whines...when? On Disk 3? That’s how many hours after Tidus goes “I need food!” in an abnoxious voice to absolutely no one. And after he’s done the whole “...sigh....life sucks...” act with Yuna at Luca before they do their infamously poor and ridiculous “HA-HA-HA-HA-HA” act. So, while one is amusing but has deep insight and philosophy and virtue to his actions, the other was a sports player, gets swallowed and proceeds to progress in lame-assery for the entirity of the game.

Besides, Zidane was made to be a weapon of death. Tidus was made for nothing at all. Zidane learned his existence would have killed and doomed the world he grew up on and the people he cared for. Tidus just learned everything he cared for and lived in was non-existent. Both distressing, though I still don’t recall someone trying to take away Tidus’ soul while he was trying to handle his grief. So, again, Zidane and Tidus have nothing in common.