I'm tempted to call The Irishman a stinker. I think Shutter Island is a worse film, but The Irishman is certainly Scorsese's most over-rated. If it had anyone else's name on it, I doubt it would have received anywhere near the sort of praise that it did.
It is, but at least Sellers brings a humanity to the character that was notably absent from Micky Rooney's performance in Breakfast at Tiffany's, which was a cartoonish stereotype.
I wouldn't call it bad, but even at the time, I felt there was an undercurrent of mean-spiritedness running through that movie, especially in the treatment of the Jamie Lee Curtis character.
Peter Jackson become so enamored with film technology that he stopped caring about telling a good story at some point. Same with George Lucas, Robert Zemeckis and Ang Lee. James Cameron seems to be headed in that direction, too, but I think the jury's still out on him.
And John Carpenter, john Landis, George Romero, and Peter Bogdanovich.
At the other extreme, how many have never made a bad film? Off the top of my head, the only two names that spring to mind are a pair of Australians - George Miller and Peter Weir.