There is a difference between the plot and the story, and the Bard lifted more than that.
Lay your hands upon Da Porto and Bandello--you will learn why Italians call Shakepeare "The Plagarist"--the story details, the characters, and their personalities are there, as well as bits of surprisingly familar dialogue--(and, interestingly, some of the plot problems in the Shakespearean play are resolved in a more sensible way)--

Ben Jonson, who alone, wrote of the Bard by name, also left us this commentary:

                                ON POET-APE 

Poor POET-APE, that would be thought our chief,
   Whose works are e'en the frippery of wit,
From brokage is become so bold a thief,
   As we, the robb'd, leave rage, and pity it.
At first he made low shifts, would pick and glean,
   Buy the reversion of old plays ;  now grown
To a little wealth, and credit in the scene,
   He takes up all, makes each man's wit his own :
And, told of this, he slights it.  Tut, such crimes
   The sluggish gaping auditor devours ;
He marks not whose 'twas first : and after-times
   May judge it to be his, as well as ours.
Fool !  as if half eyes will not know a fleece
   From locks of wool, or shreds from the whole piece ?