What do you mean by "competitive"? If you mean most popular in competitions, that'd be the Grieg of the ones you mentioned, at least to my knowledge. However, it may not be the best to due, as the judges likely are tired of hearing the piece.
If you want to piss of Thal, do the Schumann A minor 
I mean which do you think will impress the judges the most? Some background on myself as a pianist.
I have moderately good facility
I have a goodish octave technique (for a 13 year old!)
I have an ability to create a solid interpretation, but I tend to be unconventional and "weird" with my interpretations, I don't personally think this, but apparently thats how I come of to others.
I am slow when it comes to reading through a piece
I have good tonal control
Based on that information, what do you think?