Maokai, Teemo, Caitlyn, Shaco, Nidalee or Heimerdinger... Never feel safe walking into a bush EVER again.. Ultimate map control without a single ward.
(Maokai tanks and harasses with Sapling Toss, AP Teemo with a Mushroom minefield all over the map, AD Caitlyn with her Yordle Traps, Shaco with his Jack in the Boxes, Nidalee for her Bushwhack traps, or Heimerdinger for his powerful turrets, and grenade harass.)
Make this team even more dangerous by giving most of them Teleport, so they can TP to mushrooms or Heimers turrets.
Another fun combo: Alister, Poppy, Vayne, Janna, and Gragas.. Ultimate knockback/knockup combo. After facing this team, you may burn down the home depot out of hatred for walls, or become exceptionally afraid of heights thanks to all the time you spent in the air.