purist

So how as a purist can you really sit at the table with them?

It was like, he was the anti-Christ and we came from a snobby, purist direction.

After all, radically purist ideologies need to be sheltered from the vagaries of the world, and they can be expensive to maintain.

Despite a history of savvy political tactics, he's been painted as a progressive purist.

He's a conservative, but not a purist; he's a conviction politician—and a pragmatist too.

He died at the age of forty, the greatest literary purist the country had yet produced.

Is not the age of Nicaea a good time for precedents, O purist in matters ecclesiastical?

The above-quoted writer in the New York Press is a purist in vocabulary, no less than in grammar.

It has been said that on occasion his work contained passages a purist would not have passed.

She is not a bit of a purist and thinks more of a good thought forcefully put than of a slip in the way of a split infinitive.