Zoe, Malzahar, or LeBlanc?

Leblanc is getting reverted soon so wait to see if u like the new (or old version in this instance) to make the comparison

Malzahar. Super easy and brain dead, can make brain dead catches, has brain dead peel. Brain dead farming. Super effective at all stages of the game.

malz used to be more fun until they gave him that dumb passive

LeBlanc and Zoe are a lot of fun, and personally I find Malzahar kind of boring. It depends on your playstyle though.

If you want to blow people up and play as an assassin, play LeBlanc (she's also getting reverted and she's super rewarding when mastered). If you want to chunk people and provide utility at the cost of mobility, play Zoe.

I'm a LB main so I'm biased maybe, but she's for sure a lot of fun and she's the cheapest of the three. Give her a try if you want to play an assassin/mage hybrid with insane mobility and outplay potential.