What are the best non-WCA big cubes?

I own upto 11x11. I think I will like anything bigger than that. Also 11x11+ cubes have not been done blindfolded.
I remember seeing videos of Enoch Gray attempting 12x12 blindfolded, but I don't know if he ever succeeded or not. Also, is Enoch the only person with a 11x11 blindfold time?
 
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