I am looking for researchers to prove heirship of 3 HUGE estates I am just finding out about.

I am the heir by law to 3 different of my Grandfathers estates and I am looking to find the documents proving so. There will be a major reward to whoever can help me figure this out. I have a lot of proof and located property but there is a ton more and I need to get to get this figured out and try to keep all involved happy.