The "Legend of World Cinema" List
Only familiar with Depardieu from Green Card or 102 Dalmatians? Here are the performances that will help you understand his legendary status in world cinema:
#1 A Pure Formality
#2 Cyrano de Bergerac
#3 The Return of Martin Guerre
#4 The Count of Monte Cristo
#5 Colonel Chabert
#6 Menage
#7 All the Mornings in the World
#8 The Last Metro
#9  Jean de Florette
#10 The Woman Next Door

"That Man will do Anything On Camera" List
Is it because he's French?  Who knows.  Whatever the reason, Depardieu has done things on camera that most actors would fire their agents for merely suggesting.   Our list:
#1 A Pure Formality
   for being nude
#2 The Last Woman
   for self-emasculation
#3 Menage (Tenue de Soirée)
   for wooing Michel Blanc and cross-dressing
#4  Germinal
   for being nude
#5 Bye Bye Monkey
   for the rape scene
#6 Astérix & Obélix vs Caesar
   for playing Obélix
#7 The Man in the Iron Mask
   Why weren't Irons, Malkovich, Byrne or
   Di Caprio nude, hmmm?
#8 Elisa
   for the puking drunk scenes
#9 Going Places
   for the bus scene, the bath scene, the 3-way
#10 Maitress
   for the entire movie, especially the nude bits

The "At His Most Physically Gorgeous" List
Golden, buff and hunky, this great actor has been labeled a sex symbol by magazines from California to Moscow.  These flicks showcase Depardieu at his most boy-toyish:
#1 Bye Bye Monkey
#2 The Moon in the Gutter
#3 Get Out Your Handkerchief
#4 Le Chevre
#5 The Last Metro
#6 The Woman Next Door
#7 Danton
#8 Fort Saganne
# 9 1492: Conquest of Paradise
#10 The Count of Monte Cristo

"Biggest Dogs" List
When you've made 120 films and work as often out of loyalty to friends as you do out of career motivation, there's bound to be some dogs.  Our  top dog list:
#1 The Moon in the Gutter
#2 The Holes
#3  One Woman or Two

"Most Heartbreaking Performances" List
True weepers. 
#1  Jean de Florette
#2 Cyrano de Bergerac
#3 The Return of Martin Guerre
#4 Colonel Chabert
#5 Uranus
#6  The Bridge
#7  Germinal
#8  Danton

"Nasty Ways to Die" List
For some reason, film makers love to kill Depardieu off.  Here are his top ten deaths:
#1  Danton
#2 The Return of Martin Guerre
#3  Jean de Florette
#4 Bye Bye Monkey
#5 The Last Woman
#6 Cyrano de Bergerac
#7 A Pure Formality
#8 Fort Saganne
#9  Germinal
#10 The Woman Next Door

"Best Actor in a Comedy" List
The lighter side of 'the sacred monster'.   
#1 Menage
#2 Le Chevre
#3 My Father the Hero
#4 Le Plaçard
#5 Le Fugitifs
#6 Les Compères
#7 Buffet Froid
#8 Astérix & Obélix vs Caesar

"Best Romances" List
There's usually romance in one form or another in his films but these movies are all heart
#1  Green Card
#2  Too Beautiful for You
#3  Camille Claudel
#4  The Last Metro

Special Mentions:
Best Kiss:  Depardieu/Deneuve in The Last Metro
Best Polanski-style thriller:  This Sweet Sickness
Most Non-PC moment:  hitting Fanny Ardant in The Woman Next Door
Saddest moment::  Praying for rain in Jean de Florette
Funniest Moment:   Seducing Anton in the tiger-stripped undies in Menage
Sexiest Costume:  1492
Best Leading Lady:  Catherine Deneuve
Best co-star in a drama:  Roman Polanski in A Pure Formality
Best side-kick:  Tie between Christian Clavier and Segio Rubini
Most Threatening Moment::   The end of This Sweet Sickness
Best Accessory:  The hump in Jean de Florette
Best Entrance:   101 Dalmatians
Best Director:  Bertrand Blier