Could anyone give me the names of some supposedly shy-when-they're-offstage rockstars?

Tool frontman Maynard James Keenan is reclusive even when he's onstage. He often stands in darkened areas of the stage when singing. He's just as shy in private life; he's had to deal with a number of stalkers, so he now uses a paintball gun to keep tresping fans off his property.