Who has the best trophy list? The True Trophy Ratio sounds like a great system to find out.
Description of what it is from TrueTrophies themselves:
The scarcity of any given trophy is determined by comparing the number of people who have gained the award to the number of people that have played the game in question.
The smaller the percentage of people that have the trophy, the bigger the Trophy multiplier for that trophy (this multiplier is known as the TrueTrophy Ratio).