Which edition of the Talmud Yerushalmi would you recommend? I am looking for a hard copy, all Hebrew/Aramaic edition with clear print, helpful commentary, and a high level of accuracy.
Since you're looking for a hard copy edition in Hebrew, I would highly recommend the ArtScroll edition:
Since it's ArtScroll, I am sure the commentaries given in the edition are helpful :) (my honest opinion). It is great for learning.
The Oz Vahadar Edition is excellent. It even includes Rav Chaim Kanievsky's notes on the daf.