Ideally the function would search all the individuals in a tree and present them if the relevant key parameters are meet, or come close. I like the fuzzy search in the current FIND command and I use it to help... but its a slow process of setting up a series of searches by hand and running through the possibilities... especially when you know the tool could kick off a search and run the through all of them and determine the best possible summary of duplicate candidates.
I tend to look for the following.... now its true that the DOB and DOD are not always available and you have to look at parents , siblings or children to get a ball park on when they might have been born or passed. But I think the tool can handle that since the relationships are know.