Using They Shoot Pictures list of top directors and combining it with IMDb's rankings I have come up with this list. It takes the top 100 TSPDT directors* and lists their five best films as ranked by IMDb users.
If you have any problems with the choice of directors or films please don't blame me, I'm just the messenger. Even though I don't agree with every film on this list the overall quality remains very high.
*four of the original top 100 directors didn't have five or more films on the database so I had to skip them and add four more (still based on the TSPDT list). They are...
* Jean Vigo (No. 34)
* Gillo Pontecorvo (No. 77)
* Claude Lanzmann (No. 84)
* George Cukor (No. 89)