So if you learn about how Pecans work you basically need the right type of pollinators close enough to do well. While this is fairly well known exactly where all of them stack up next to each other is just difficult information to find. I found a chart that has finally shed the light on this. Usually websites will only have a few pecan varieties and will say “this one does good with x”, which is a variety they sell, but not necessarily one you want. What about comparing across websites? Well here we go.
Here are some more resources that Chad provided. Awesome as well.
Another Good Chart