low-churchman

from The Century Dictionary.

• noun One of those members of the Anglican Church who do not consider possession of the apostolic succession essential to constitute a valid ministry, regard the sacraments and sacramental rites rather as signs or symbols of grace than as having grace necessarily contained in them, and oppose sacerdotalism and ornate ritual.

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

• noun One who holds low-church principles.