At least 90% fresh at Rotten Tomatoes, listed by number of reviews:

The Bourne Ultimatum

No Country for Old Men

Knocked Up

Ratatouille

There Will Be Blood

Hairspray

Sicko

Juno

Hot Fuzz

The Simpsons Movie

Michael Clayton

Gone Baby Gone

Enchanted

Le Scaphandre et le Papillon (The Diving Bell and the Butterfly)

Rescue Dawn

Once

Persepolis

Gwoemul (The Host)

Away from Her

4 Months, 3 Weeks and 2 Days

The Counterfeiters

The Band's Visit (Bikur Ha-Tizmoret)

In the Shadow of the Moon

Encounters at the End of the World

The King of Kong: A Fistful of Quarters

No End in Sight

The Italian

Taxi to the Dark Side

This Is England

U2 3D

My Winnipeg

My Kid Could Paint That

Killer of Sheep: The Charles Burnett Collection

God Grew Tired Of Us

Ten Canoes

An Unreasonable Man

Lake of Fire

The Devil Came on Horseback

Up the Yangtze

La Graine et le Mulet (The Secret of the Grain) (Couscous)

Must Read After My Death

For the Bible Tells Me So

Nanking

Triad Election (Hak se wui yi wo wai kwai)

A fost sau n-a fost?, (12:08 East of Bucharest)

Surfwise

Shotgun Stories

Grbavica: The Land of My Dreams (Esma's Secret - Grbavica)

The Life of Reilly