Minor correction, Rebecca:  Curt Swan didn't ink himself in the 50s, to my knowledge.  When he first started out on the Superman books his primary inker was John Fischetti.  On Jimmy Olsen he was paired with Ray Burnley, and by the end of the decade Stan Kaye was inking him a lot on the various covers he did.  Instances of him inking himself are few and far between... page 1 of the Legion story in Adventure Comics #369 being a notable example.

And to correct myself... earlier I said that Shade was the last time Ditko wrote a book for a major publisher.  I forgot about his run on The Fly for MLJ in 1983-84. 

(I happen to be reading the original Steve Englehart/George Perez run on AVENGERS right now, and that is just flowing too, but I don't have that sense with everything that either did elsewhere.)

(Might be able to find a cheaper copy elsewhere, though.)

The Fly also has a notable place in Ditko's history in that it indirectly landed Ditko the Spider-Man gig, because when Ditko pointed out to Stan that the Kirby-plotted Spider-Man origin story was very similar to The Fly's origin, Stan decided to have Ditko redo the story. 

For some reason, the unpublished issue of Mister Miracle (which would have been issue #26) did not even make it into Cancelled Comic Cavalcade.  Only the cover is in there. 

Of his later work, I think he really cut loose on SHADE THE CHANGING MAN, with dimensional traveling and illusions.  Here are the first four issues, all penciled and inked by Steve Ditko.

Just the very nature of Shade's powers shows Ditko's unique inventiveness and that he was still trying to push the boundaries of his art.