The winners from two years ago edged ahead of Oliver Townend and Cooley Rosalent on the final day of the MARS Badminton Horse Trials.
The top two finishers at the MARS Badminton Horse Trials both had flag penalties which caused concern, but were later dropped.
Incessant rain resulted in a modified cross-country course which saw Caroline Harris and D. Day rocket up the standings.
Two days of dressage culminated with last year's winning rider on top; Canada's Jessica Phoenix sits 62nd with Wabbit.
European champion Rosalind Canter celebrated her second 5* win this year at the French fixture which saw cross-country day shake up the standings.
Following a wet XC in which no one made the optimum time, the British rider had one of just two clear stadium rounds to seal the deal.
The 2018 world champion led the competition from start to finish and had four rails in hand going into the final phase.
The ten days of world-class competition in Germany were full of top sport, drama, delight, surprises, triumph and tragedy.
The reigning world champ rode Lordships Graffalo to victory and her next stop is the upcoming European Championships in Switzerland.
Canter maintains first place in the 4*-S and sits one-two in the 3*-L; Bullimore and Evita lead 2*-L going into Saturday's cross-country.