I just found out recently about this guy on the left. I was by my friend's house and a small picture of him was taped on the wall. Apparently he, the Grand Rabbi Yeshaya Steiner of Kerestir, has the amazing ability to bless homes that display his likeness with a segulah to keep away mice! (Though ironically while I was there - I actually did see a mouse!)
How this is foundationally different from Catholics and their semi-avodah zara patron saints of whatever is a distinction lost to me.