intrusionist

from The Century Dictionary.

• noun One who intrudes, or favors intrusion; specifically, one of those in the Established Church of Scotland who denied the right of a parish or congregation to resist or object to the settlement or appointment of an obnoxious minister by a patron.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who intrudes; especially, one who favors the appointment of a clergyman to a parish, by a patron, against the wishes of the parishioners.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun historical One who favours the appointment of a clergyman to a parish, by a patron, against the wishes of the parishioners.