GOOD tasting protein

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I would like to add additional protein to the occasional shakes/smoothies I make but have found many have an unpleasant taste. So far, the best I have found is Medifast products. I am very sensitive to anything that has coconut product in it. I'm ok with whey and even soy. I think I like vanilla flavor best if there is not a "flavorless" option.

I've tried some of the GNC products without success. I've had some recommendations for Shakeology?

Any thoughts? Thanks in advance!