Is there any sovereign who can still rule like king Geoffrey?

You mean King Joffrey from Game of Thrones? Who reigned briefly, and during that time could essentially only effectively rule what occurred in his immediate presence and then only mostly by surprise, since otherwise effective rule in his name was mostly by his mother, uncle, or (simultaneously paternal and maternal) grandfather according to their own desires?

Yeah, there are real monarchs with at least that much power a number of places.