Is "as little as one" grammatical or should it always be "as few as one" since 'one' implies the thing is countable?

I've used the phrase "as few as one individual from the business has contact with the customer" in a paper and the more I look at it, the more wrong it looks! But "as little as one individual" doesn't seem any better. I can count 'individuals' i.e. people, so should it be 'as few as'? If anyone can rephrase this without using either less or fewer that would also solve the problem!


How would the parallel word appear?

As much as 10 and as little as one. (Both "much" and "little" seem wrong here.)

As many as 10 and as few as one. (This sounds fine to me.)