Probably A Midsummer Night's Dream or The Merchant of Venice.
Don't make the mistake of thinking you'll be able to undestand the plays right off the bat though. Even the 'accessible' ones. Here 'accessible' only means 'less challenging'. They're still hard. Take this speech from Hamlet for instance:
I have of late,—but wherefore I know not,—lost all my mirth, forgone all custom of exercises; and indeed, it goes so heavily with my disposition that this goodly frame, the earth, seems to me a sterile promontory; this most excellent canopy, the air, look you, this brave o’erhanging firmament, this majestical roof fretted with golden fire,—why, it appears no other thing to me than a foul and pestilent congregation of vapours. What a piece of work is man! How noble in reason! how infinite in faculties! in form and moving, how express and admirable! in action how like an angel! in apprehension, how like a god! the beauty of the world! the paragon of animals! And yet, to me, what is this quintessence of dust?
Now when I first read this I didn't know what the HELL it meant but after a few goes it made sense. Sometimes you will have to read the same speech over and over but it will click.