Just looking at this quickly, there is a lot of work to be done on this family. There are also at least two records for each of his parents (mother, one with maiden name, the other says Unknown). There is also still much cleanup work from a previous merge that needs to be done. Most Wikitreers like to start merging from the earliest generation of duplicate profiles, because one set of parents will be disconnected on a merge farther down the line. That's not a disaster if you keep track of the needed merges and propose them, too. But it's cleaner and easier to start with the earliest duplicated generation.