Unblemished

I want an unblemished lamb.

He found what he described as "air unadulterated with human additives, stars undimmed by city lights, the uninterrupted sounds of nature, and fields of flowers unblemished by footprints."

His reputation remains unblemished.

His own estate it most decidedly was, for he had paid for it with his own money; but it had not descended to him from a long line of unblemished ancestry.