The first problem is that Find A Grave is very unreliable and should not be counted as a source but aside from that with only a decade range for the birth and no actual location and the same for death date and location any search would have too many listings for different people to be any help. You need to find out more about what you do know first. You were in your 30's when he died so you should be able to add the location of his death, at least the country, and that would narrow down the list of possibilities. FAG is a seperate site that also has all of their information added by volunteers so if you have a problem with their data you should take it up with them and not us.