In my search to find a natural smelling vanilla I am using natural vanilla (low alcohol madagascar) extract, vanilla powder, powdered vanilla beans and vanilla oleoresin (essential oil)... (and combos of these). If you call some of the big vanilla manufacturing companies they may send you samples. I am amazed at the strength of the vanilla scent that comes through. I have used a mix in combination with a tried and true coconut FO (just a smidge to sweeten the vanilla). fyi I am discovering that some of the larger all natural Bath and Body companies in fact due use many kinds of fruit/flower/ etc. extracts to scent their products! I have tried the extract combo in CP and HP, next is to try them in bath bombs.
btw, I am finding that I need to use half the amount or less of the extract blend for the scent to come through.