Are you having difficulty reading? Gabriel.
If we agree that the word "emissary" refers to an ambassador or representative, you think Gabriel was "Christ's holiest emissary?" More than Paul? More than John the Baptist? More than Luke? More than the apostle John? More than Peter?
Did Gabriel risk his life for anyone? Did Gabriel preach the Gospel to heathens hoping to kill him? What did Gabriel suffer to be Christ's emissary?
What did Gabriel do that would make you call him "Christ's holiest emissary?"