Regardless of who is 'the best' surgeon in the EU, one thing it can't be based on is ridiculous sample sizes like 1 patient dying vs 2 vs 0. Such small numbers are, absent strong evidence to the contrary of specific malpractice, far more likely to be the result of variance.
Paley might never have had a death. I've no doubt Paley is a great surgeon, but he's also been lucky if that's true. Not every serious complication is the fault of the doctor, nor the patient, sometimes it just falls into the category of 'bad stuff happens sometimes'.
When assessing the skill of a doctor it's far more worthwhile to focus on stuff there's a reasonable sample size on. How many surgeries have they performed? How often do their patients reach their lengthening goals? What's the incidence of more minor complications such as pin site infections and nail bending? How's pain management handled? What is the general consensus on the quality of the PT offered? All of those things will have a far greater sample size as they are relevant to all patients who have ever undergone lengthening. Focusing on whether one doctor had a single fatal case of PE in thousands of surgeries vs another doctor who had 0 tells you absolutely nothing unless there's actual hard evidence of malpractice in that '1' case.
1 bad outcome is rarely going to be proof of anything, you have to look at the overall trends to get a solid idea of skills.