Possible Clues:

• Church painter, one working for Reformation
• Worker's champion bordering on clownish talent
• Church painter, one who follows trends
• Social reformer in church, one painting a picture maybe
• Church painter, one who hoped to reform
• Church painter, perhaps, or reformer
• Check with painter, one in old working-class movement
• Member of a Parliamentary reform movement of the mid-19th Century
• Member of 19th century reform movement