List of grade 6+ Etudes?

[teelo17]

Currently almost finished learning Nocturne in Eb Major op.9 no.2, was wondering if anyone had or could form a small list of 3-6 Etudes from various composers that would continue to challenge my piano skill/technique that I could focus on for the next few months, don't mind if they are long or short, I'm quite out of touch with finding gems hidden under the popular ones. Any help is appreciated.

[dogperson]

Go to pianosyllabus.com
Search for Etude, grade 6.  There are 33 listed.
I would also recommend you search for grade 5 and grade 7 etudes, as grading is not always consistent