Stunningly talented 3 year old dressage mare (Kingston Blue Hors x Wynton)

Several grand prix horses in sire and dam bloodline
Good gaits, sober and a very nice character: honest, people-oriented, curious, well-behaved and affectionate
No stable defects, does everything well
The mare is just a few weeks old saddled up and ready to train. The next owner can still completely control her.
Work-willing mare who likes to work with the rider.
Which rider will work with this topper?