HaKatan,
You will need to define Zionism. I am talking about Religious Zionism, i.e. those who believe that Jews should strive to gain and maintain sovereignty in Eretz Yisroel as a religious obligation.
On the other end of the spectrum there were Gedolim such as Reb Elchonon, the Brisker Rov and the Satmar Rebbe who held that such a mission was the opposite of what a Jew should do and was in fact and aveirah. (Of course we don’t really know what Reb Elchonon would have held after the state was established).
In the middle were many other Gedolim, who may have opposed the Zionists of their times (who were mostly secular) or who may have felt that even if it is a mitzvah to retake E”Y it could not be done through hischabrus with reshaiim. Others changed their positions before and after the founding of the state.
I have no idea how one could “rank” the Gedolim of the previous generation(s). I do believe however that the names I mentioned were all great, great Talmidei Chachamim or Tzaddikim or both.