Maokai is amazing at stopping people from capturing a point (he can also lock down a single target quickly for your team to burst them down, while putting out some decent burst himself).
Leblanc gets insane burst quickly
Lux fits the same category as Maokai, except she also has a mapwide laser but requires aim to land her major CC.
etc. We've only seen the tip of the iceburg so far, I fought a tankidps team my first game and we rolfstomped them with this set up (I think we also had Ashe and Xin).
We fought Riven (who built tankier), Monkey King, Lee Sin, Nidalee, and Akali, but we had a stronger presence around turrets (most of our abilities could be used at a safe range to keep them from capturing, or we had enough burst to completely shut one down if they tried to engage) and could burst someone trying to defend a turret in a few short sweet seconds. Heck, if we caught anyone they were dead before their team had a time to react. The only time we died is if they caught us in a gank, which was few and far between.
On Dominion, Burst is sick.