I haven't had them all but I haven't found any to be good taste-wise.
In general, the soy-based ones seem to be the best. Pea and rice-based ones are the worst.
However, you should really re-think your need for a vegan protein powder. They ARE expensive. Plus many of them are full of chemicals and highly processed things like isolate and concentrates.
Most of the people who buy them overestimate their protein needs. And there is only so much protien a person can absorb and utilize per meal.
Try this instead, one cup soy milk, 2 tbsp peanut butter, 1 tbsp ground flaxseed, and a banana.
400 calories, 17 g protein,