Champion Sub-Classes: Defense Champion

This is not a champion concept post but rather a question post

Within every class: Assassin, Fighter, Mage, Support, Tank, and Markman each champion has basic characteristics to them that make them fit that role

and within that role there are sub-classes: within the tanks there are juggernauts within the supports there are CC chainers

these sub classes allow a champion to specialize in a form of there role

My question is where is the Defense sub-class as in these champions that can serioulsy defend a certain area and the allies or objective with in Im not talking about a tank that peels, or a mage with a large amount of offensive area of control

I am talking about a Champion that can seriouly deny an enemy team a certain area or objective, through defense. Whether it be denying enemy access to an area (movement = blockades, terrain), or attacking (reducing AS, AD, providing shields of various effect or sizes) and denying enemies the ability to take objectives (blue/red buff, turrets, dragon, nashor, herald)

do we have any champions that do this sort of thing?