The popular ones are both too established and too difficult (although, there are plenty manageable ones for this level). A story from my teacher from years past:
A student was doing their performance for an A-level, and as opposed to do something from a grade book (as recommended by the teacher) they decided they wanted to do a Beethoven sonata. By this time they already had their Dip.ABRSM, so they went and did their exam, played perfectly fine, and then the examiner afterwards said to the pupil's teacher "That's a piece I'VE struggled with technically and musically all my life, they didn't do any better."
I don't know how truthful this story is, but I do know, if it's popular, and everyone has played it to some degree (which ever pianist has I gather), they've got more of an opinion to clash with yours.
From memory the A2 syllabus recommends a piece of at least grade 6 difficulty, I assume the reason for that is post grade 8 studies are expected in your University of choice.